Anti-freezing indirect evaporation open type cooling tower

Abstract

The utility model relates to an anti-freezing indirect evaporation open type cooling tower which comprises an anti-freezing liquid water tank, a tower body, a surface air cooler, a pre-cooling water pump, a heat exchange coil pipe, a water distributor, a filler, a water storage tank, a cooling water pump and a fan, and the surface air cooler, the pre-cooling water pump, the heat exchange coil pipe, the water distributor, the filler, the water storage tank, the cooling water pump and the fan are located in the tower body. The upper end liquid outlet end of the surface air cooler is communicated with the liquid inlet end of the heat exchange coil through a pipeline, the liquid outlet end of the heat exchange coil is communicated with a liquid inlet of the precooling water pump through a pipeline, a liquid outlet of the precooling water pump is communicated with the lower end liquid inlet end of the surface air cooler through a pipeline, and the heat exchange coil is arranged in a water receiving area of the water storage tank. A water inlet of the cooling water pump is communicated with the water storage area of the water storage tank through a pipeline, the filler is located above the water receiving area of the water storage tank and located behind the surface air cooler, and the water distributor is located above the filler and communicated with an external cooling pipe network. The anti-freezing function in winter is achieved, and indirect evaporative cooling can be conducted in other seasons to lower the outlet water temperature.

Description

Technical Field

[0001] The utility model relates to the field of evaporative cooling and heat exchange products, in particular to an antifreeze type indirect evaporative open cooling tower which can be normally used in northern cold areas in winter. Background Art

[0002] Conventional open cooling towers are very prone to ice clogging the packing when used in the cold northern regions in winter, affecting the normal use of the cooling tower. Indirect evaporative cooling is a process in which the ambient air is first cooled by sensible heat exchange through a heat exchanger to reduce the wet bulb temperature of the air, and then directly evaporates on the surface of the packing to obtain cold air or cold water close to the dew point temperature. Indirect evaporative open cooling towers will also encounter similar antifreeze problems as conventional open cooling towers when used in winter. Improper handling will cause equipment damage, increasing the difficulty and cost of operation and maintenance. The utility model aims to provide an indirect evaporative open cooling tower that can be used normally in winter and has an antifreeze function, which can not only reduce operation and maintenance costs, but also greatly improve energy efficiency. Utility Model Content

[0003] In order to overcome the shortcomings of existing products and technologies, the utility model provides an antifreeze type indirect evaporative open cooling tower. The cross-flow indirect evaporative open cooling tower utilizes a heat exchange coil placed under the filler to heat the ambient air in winter and cool it in other seasons through a surface cooler placed at the inlet of the antifreeze type indirect evaporative open cooling tower. It not only realizes the antifreeze function in winter, but also can perform indirect evaporative cooling in other seasons to reduce the outlet water temperature.

[0004] The technical solution of the implementation case of the utility model is as follows:

[0005] An antifreeze type indirect evaporative open cooling tower, the open cooling tower comprises an antifreeze liquid water tank, a tower body, and a surface cooler located inside the tower body, a precooling water pump, a heat exchange coil, a water distributor, a filler, a water storage tank, a cooling water pump, and a fan. The surface cooler is located at the air inlet of the tower body, the upper liquid inlet end of the surface cooler is connected to the antifreeze liquid water tank located above through a pipeline, the upper liquid outlet end of the surface cooler is connected to the liquid inlet end of the heat exchange coil through a pipeline, and the liquid outlet end of the heat exchange coil is connected to the liquid inlet of the precooling water pump through a pipeline. The liquid outlet of the precooling water pump is connected to the liquid inlet end of the lower end of the surface cooler through a pipeline, the heat exchange coil is placed in the water receiving area of ​​the water storage tank, the water inlet of the cooling water pump is connected to the water storage area of ​​the water storage tank through a pipeline, the water inlet and outlet of the cooling water pump are connected to the external cooling network through a pipeline, the filler is located above the water receiving area of ​​the water storage tank and behind the surface cooler, the water distributor is located above the filler, the water distributor is connected to the external cooling network through a pipeline, and the fan is located at the top of the tower body.

[0006] The utility model also provides an antifreeze type indirect evaporative open cooling tower, the open cooling tower comprises an antifreeze liquid tank, a tower body, and a surface cooler located inside the tower body, a precooling water pump, a heat exchange coil, a water distributor, a filler, a water storage tank, a cooling water pump, and a fan. The surface cooler is located at the air inlet of the tower body, the upper liquid outlet end of the surface cooler is connected to the liquid inlet end of the heat exchange coil through a pipeline, the liquid inlet end of the heat exchange coil is also connected to the antifreeze liquid tank located below through a pipeline, and the liquid outlet end of the heat exchange coil is connected to the liquid inlet of the precooling water pump through a pipeline. The liquid outlet of the precooling water pump is connected with the liquid inlet end of the lower end of the surface cooler through a pipeline, the heat exchange coil is placed in the water receiving area of ​​the water storage tank, the water inlet of the cooling water pump is connected with the water storage area of ​​the water storage tank through a pipeline, the water inlet and outlet of the cooling water pump are connected with the external cooling network through a pipeline, the filler is located above the water receiving area of ​​the water storage tank and behind the surface cooler, the water distributor is located above the filler, the water distributor is connected with the external cooling network through a pipeline, and the fan is located at the top of the tower body.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] By placing a heat exchange coil in the water tank, the heat exchange coil can exchange heat with the cooling water in the water tank, and then the heat exchange coil can be used to pre-cool the hot air in different seasons and to heat the cold air. By setting up an antifreeze tank, antifreeze is input into the heat exchange coil to prevent the heat exchange coil from freezing in winter, thus achieving winter antifreeze and lower water outlet temperature in other seasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a first specific implementation mode of an antifreeze type indirect evaporative open cooling tower in the utility model;

[0010] Figure 2 It is a structural schematic diagram of a second specific implementation mode of an antifreeze type indirect evaporative open cooling tower in the utility model;

[0011] 10. Antifreeze tank; 11. Surface cooler; 12. Precooling water pump; 13. Heat exchange coil; 14. Water distributor; 15. Filler; 16. Water storage tank; 17. Cooling water pump; 18. Fan; 21. Water receiving area; 22. Water storage area; 23. Antifreeze tank. DETAILED DESCRIPTION

[0012] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0013] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0015] like Figure 1 As shown, Figure 1 1 is a structural schematic diagram of a first specific embodiment of an antifreeze type indirect evaporative open cooling tower in the utility model; an antifreeze type indirect evaporative open cooling tower, the open cooling tower comprises an antifreeze liquid tank 10, a tower body and a surface cooler 11 located inside the tower body, a precooling water pump 12, a heat exchange coil 13, a water distributor 14, a filler 15, a water storage tank 16, a cooling water pump 17, and a fan 18, the surface cooler 11 is located at the air inlet of the tower body, the upper liquid inlet end of the surface cooler 11 is connected to the antifreeze liquid tank 10 located above through a pipeline, the upper liquid outlet end of the surface cooler 11 is connected to the liquid inlet end of the heat exchange coil 13 through a pipeline, and the liquid outlet end of the heat exchange coil 13 is connected to the liquid outlet end of the heat exchange coil 13 through a pipeline. The heat exchange coil 13 is placed in the water receiving area 21 of the water storage tank 16, and the water inlet of the cooling water pump 17 is connected to the water storage area 22 of the water storage tank 16 through a pipe. The water inlet and outlet of the cooling water pump 17 are connected to the external cooling network through a pipe. The filler 15 is located above the water receiving area 21 of the water storage tank 16 and behind the surface cooler 11. The water distributor 14 is located above the filler 15. The water distributor 14 is connected to the external cooling network through a pipe. The fan 18 is located at the top of the tower body.

[0016] In summer, spring and autumn, the hot air outside is precooled by heat exchange with the antifreeze liquid with low temperature in the surface cooler. The precooled air exchanges heat with the cloth water in the filler and evaporates. After cooling, the cloth water flows into the water receiving area in the water storage tank and exchanges heat with the heat exchange coil placed in the water receiving area. The temperature of the antifreeze in the heat exchange coil is reduced and it is transported to the surface cooler through the precooling water pump to exchange heat with the external hot air, and the cycle continues. The cooling water in the water storage tank is pumped to the external pipe network by the cold water pump. Because the temperature of the hot air evaporated by heat exchange with the cloth water is lower after precooling, the outlet water temperature of the cloth water in the indicator filler is also lower.

[0017] In winter, the outside air is cold air, and in some areas it even reaches below -5°C. When the cold wind below -5°C passes through the packing, it will cause the cloth water in the packing to gradually produce ice slag and ice cubes locally, which has a great impact on the performance of the packing. The heat exchange coil in the utility model is provided with antifreeze, and the antifreeze in the heat exchange coil is heat-exchanged with the normal water above 10°C in the water storage tank to about 10°C. The antifreeze at about 10°C is transported to the surface cooler through a pre-cooling water pump to exchange heat with the external cold wind below -5°C. The cold wind is heat-exchanged and heated to warm wind above 0°C and enters the packing. Since the temperature of the cold wind is greater than 0°C, the cloth water in the packing will not freeze into ice slag and ice cubes.

[0018] The utility model also provides an antifreeze type indirect evaporation open cooling tower such as Figure 2 As shown, Figure 2 1 is a structural schematic diagram of a second specific embodiment of an antifreeze type indirect evaporative open cooling tower in the utility model; an antifreeze type indirect evaporative open cooling tower, the open cooling tower comprises an antifreeze liquid tank 23, a tower body and a surface cooler 11 located inside the tower body, a precooling water pump 12, a heat exchange coil 13, a water distributor 14, a filler 15, a water storage tank 16, a cooling water pump 17, and a fan 18, the surface cooler 11 is located at the air inlet of the tower body, the upper liquid outlet end of the surface cooler 11 is connected to the liquid inlet end of the heat exchange coil 13 through a pipeline, the liquid inlet end of the heat exchange coil 13 is also connected to the antifreeze liquid tank 23 located below through a pipeline, and the liquid outlet end of the heat exchange coil 13 is connected to the antifreeze liquid tank 23 located below through a pipeline. The channel is connected with the liquid inlet of the precooling water pump 12, the liquid outlet of the precooling water pump 12 is connected with the lower liquid inlet end of the surface cooler 11 through a pipeline, the heat exchange coil 13 is placed in the water receiving area 21 of the water storage tank 16, the water inlet of the cooling water pump 17 is connected with the water storage area 22 of the water storage tank 16 through a pipeline, the water inlet and outlet of the cooling water pump 17 are connected with the external cooling pipeline network through a pipeline, the filler 15 is located above the water receiving area 21 of the water storage tank 16 and behind the surface cooler 11, the water distributor 14 is located above the filler 15, and the water distributor 14 is connected with the external cooling pipeline network through a pipeline, and the fan 18 is located at the top of the tower body.

[0019] The second embodiment is different from the first embodiment in the way of providing the refrigerant. The first embodiment adopts an antifreeze liquid water tank above, while the second embodiment adopts an antifreeze liquid tank placed below. The antifreeze liquid water tank in the first embodiment flows to the liquid inlet of the surface cooler under the action of gravity, is sucked by a pre-cooling water pump and sent to the heat exchange coil, and after heat exchange, is sent to the surface cooler and circulated in this way; while the antifreeze liquid tank in the second embodiment is transported from the outlet of the antifreeze liquid tank to the heat exchange coil under the suction of the pre-cooling water pump, and after heat exchange, is transported to the surface cooler, and then transported to the heat exchange coil after heat exchange in the surface cooler.

[0020] The beneficial effects of the utility model are:

[0021] By placing a heat exchange coil in the water tank, the heat exchange coil can exchange heat with the cooling water in the water tank, and then the heat exchange coil can be used to pre-cool the hot air in different seasons and to heat the cold air. By setting up an antifreeze tank, antifreeze is input into the heat exchange coil to prevent the heat exchange coil from freezing in winter, thus achieving winter antifreeze and lower water outlet temperature in other seasons.

[0022] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0023] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An antifreeze type indirect evaporative open cooling tower, characterized in that: The open cooling tower comprises an antifreeze liquid tank, a tower body, and a surface cooler, a precooling water pump, a heat exchange coil, a water distributor, a filler, a water storage tank, a cooling water pump, and a fan located inside the tower body. The surface cooler is located at the air inlet of the tower body. The upper liquid inlet end of the surface cooler is connected to the antifreeze liquid tank located above through a pipeline. The upper liquid outlet end of the surface cooler is connected to the liquid inlet end of the heat exchange coil through a pipeline. The liquid outlet end of the heat exchange coil is connected to the liquid inlet of the precooling water pump through a pipeline. The liquid port is connected to the lower liquid inlet end of the surface cooler through a pipeline, the heat exchange coil is placed in the water receiving area of ​​the water storage tank, the water inlet of the cooling water pump is connected to the water storage area of ​​the water storage tank through a pipeline, the water inlet and outlet of the cooling water pump are connected to the external cooling network through a pipeline, the filler is located above the water receiving area of ​​the water storage tank and behind the surface cooler, the water distributor is located above the filler, the water distributor is connected to the external cooling network through a pipeline, and the fan is located at the top of the tower body.

2. An antifreeze type indirect evaporative open cooling tower, characterized in that: The open cooling tower comprises an antifreeze tank, a tower body, and a surface cooler, a precooling water pump, a heat exchange coil, a water distributor, a filler, a water storage tank, a cooling water pump, and a fan located inside the tower body. The surface cooler is located at the air inlet of the tower body. The upper liquid outlet of the surface cooler is connected to the liquid inlet of the heat exchange coil through a pipeline. The liquid inlet of the heat exchange coil is also connected to the antifreeze tank located below through a pipeline. The liquid outlet of the heat exchange coil is connected to the liquid inlet of the precooling water pump through a pipeline. The liquid outlet of the precooling water pump The outlet is connected with the lower liquid inlet of the surface cooler through a pipeline, the heat exchange coil is placed in the water receiving area of ​​the water storage tank, the water inlet of the cooling water pump is connected with the water storage area of ​​the water storage tank through a pipeline, the water inlet and outlet of the cooling water pump are connected with the external cooling network through a pipeline, the filler is located above the water receiving area of ​​the water storage tank and behind the surface cooler, the water distributor is located above the filler, the water distributor is connected with the external cooling network through a pipeline, and the fan is located at the top of the tower body.

Images