Container type indirect evaporation open type cooling tower

Abstract

The utility model relates to a container type indirect evaporation open type cooling tower which comprises an upper container module and a lower container module which are in butt joint, the upper container module comprises an upper container body and an upper layer indirect evaporation unit, and the lower container module comprises a lower container body and a lower layer indirect evaporation unit. The upper container body is provided with an upper outer air inlet, an inner air inlet, an air outlet, a cooling water outlet through hole and a lower screw hole, the lower container body is provided with a lower outer air inlet, an inner air outlet, a cooling water inlet through hole and an upper screw hole, the upper container body and the lower container body are fixedly installed through screws, and the inner air inlet and the inner air outlet are communicated with a ventilation channel. And the cooling water outlet through hole is communicated with the cooling water inlet through hole to form a water passing channel. The device is convenient to transport and simple to mount, realizes an anti-freezing function in winter, and can perform indirect evaporative cooling in other seasons to reduce the water outlet temperature.

Description

Technical Field

[0001] The present invention relates to the field of evaporative cooling and heat exchange products, and more particularly to a containerized indirect evaporative open cooling tower that is convenient for transportation, simple to install, and can be normally used in winter in cold regions of the north. Background Art

[0002] Conventional open cooling towers are large in volume and irregular in shape, making it very inconvenient for manufacturers to transport them as a whole, and it is also time-consuming and laborious to install and use them at the customer end.

[0003] When conventional open cooling towers are used in winter in cold regions of the north, they are very likely to freeze and block the packing, affecting the normal use of the cooling tower. Indirect evaporative cooling is a process of first performing sensible heat exchange on ambient air through a heat exchanger to lower the wet bulb temperature of the air, and then performing direct evaporation 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 anti-freezing problems as conventional open cooling towers in winter. Improper handling will cause equipment damage, increasing the operation and maintenance difficulty and cost. The present invention aims to provide an indirect evaporative open cooling tower that can be normally used in winter and has an anti-freezing function, which can not only reduce the operation and maintenance cost, but also greatly improve the energy efficiency. Summary of the Invention

[0004] To overcome the deficiencies of existing products and technologies, the present invention provides a containerized indirect evaporative open cooling tower, which integrates a container, uses the box body as the skeleton of the cooling tower, and arranges functional components inside the box body to form an integrated module, making the cooling tower convenient for transportation and simple to install. It uses heat exchange coils placed below the packing, and heats the ambient air in winter and cools it in other seasons through a surface cooler placed at the inlet of the anti-freezing type indirect evaporative open cooling tower, not only realizing the anti-freezing function in winter, but also performing indirect evaporative cooling in other seasons to reduce the outlet water temperature.

[0005] The technical solution of the embodiment of the present invention is as follows:

[0006] A containerized indirect evaporative open cooling tower. The open cooling tower includes a docked upper container module and a lower container module. The upper container module includes an upper container body and an upper-layer indirect evaporation unit disposed within the upper container body. The lower container module includes a lower container body and a lower-layer indirect evaporation unit disposed within the upper container body. The upper container body has an upper external air inlet, an internal air inlet, an air outlet, a cooling water outlet through hole, and a lower screw hole. The lower container body has a lower external air inlet, an internal air outlet, a cooling water inlet through hole, and an upper screw hole. The upper container body and the lower container body are installed and fixed by connecting the lower screw hole and the upper screw hole with screws. The internal air inlet is communicated with the internal air outlet to form a ventilation channel between the upper-layer indirect evaporation unit and the lower-layer indirect evaporation unit. The cooling water outlet through hole is communicated with the cooling water inlet through hole to form a water passing channel between the upper-layer indirect evaporation unit and the lower-layer indirect evaporation unit.

[0007] Preferably, the upper-layer indirect evaporation unit includes a fan and an upper water distributor, an upper filler, an upper water receiving tank, and a wind valve that are symmetrically arranged about the center. The wind valve is fixedly located at the upper external air inlet. The upper filler is located behind the wind valve in the air inlet direction. The upper water distributor is located directly above the upper filler and is fixed to the upper container body. The upper water receiving tank is located directly below the upper filler and is fixed to the upper container body. The fan is located at the air outlet. The lower-layer indirect evaporation unit includes a water storage tank and a lower water distributor, a lower filler, a surface cooler, a heat exchange coil, a precooling pump, and a cooling pump that are symmetrically arranged about the center. The surface cooler is fixedly located at the lower external air inlet. The lower filler is located behind the surface cooler in the air inlet direction. The lower water distributor is located directly above the lower filler and is fixed to the lower container body. The water storage tank is located directly below the upper filler and is fixed to the lower container body. The heat exchange coils are located on both sides within the water storage tank. The water inlet end of the surface cooler is communicated with the water outlet of the precooling pump through a pipeline. The water inlet of the precooling pump is communicated with one end of the heat exchange coil through a pipeline. The other end of the heat exchange coil is communicated with the water outlet end of the surface cooler through a pipeline. The water inlet end of the cooling pump is communicated with the water storage tank through a pipeline. The water outlet end of the cooling pump is communicated with an external pipeline. The lower water distributor is communicated with the upper water receiving tank through the water passing channel.

[0008] Preferably, the lower-layer indirect evaporation unit further includes an antifreeze tank. The antifreeze tank is located above the surface cooler. The outlet of the antifreeze tank is communicated with the liquid inlet end of the surface cooler through a pipeline.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] By integrating the container body, the cooling tower has achieved integrated modularization, which is convenient for transportation and installation; by placing the heat exchange coil in the water storage tank, the heat exchange coil exchanges heat with the cooling water in the water storage tank, and then pre-cools the hot air in different seasons outside through the heat exchange coil, and heats up the cold air through heat exchange; by setting up an antifreeze tank and inputting the antifreeze into the heat exchange coil, the heat exchange coil will not freeze in winter, achieving antifreeze in winter and lower outlet water temperature in other seasons. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the structural principle of a container-type indirect evaporative open cooling tower in the present invention;

[0012] 10. Upper container module; 11. Upper container body; 111. Upper external air inlet; 112. Inner air inlet; 113. Air outlet; 114. Cooling water outlet through hole; 12. Fan; 13. Upper water distributor; 14. Upper packing; 15. Upper water receiving tank; 16. Air valve; 20. Lower container module; 21. Lower container body; 211. Lower external air inlet; 212. Inner air outlet; 213. Cooling water inlet through hole; 22. Water storage tank; 23. Lower water distributor; 24. Lower packing; 25. Antifreeze tank; 26. Surface cooler; 27. Heat exchange coil; 28. Pre-cooling pump; 29. Cooling pump. Detailed Embodiments

[0013] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown 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.

[0014] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0016] As Figure 1 shown, Figure 1Schematic diagram of the structural principle of a containerized indirect evaporative open cooling tower in the present invention; a containerized indirect evaporative open cooling tower, the open cooling tower includes a butt-connected upper container module 10 and a lower container module 20. The upper container module 10 includes an upper container body 11 and an upper-layer indirect evaporation unit arranged inside the upper container body 11. The lower container module includes a lower container body 21 and a lower-layer indirect evaporation unit arranged inside the lower container body 21. The upper container body 11 has an upper external air inlet 111, an internal air inlet 112, an air outlet 113, a cooling water outlet through hole 114, and lower screw holes. The lower container body 21 has a lower external air inlet 211, an internal air outlet 212, a cooling water inlet through hole 213, and upper screw holes. The upper container body 11 and the lower container body 21 are installed and fixed by screwing the lower screw holes and the upper screw holes. The internal air inlet 112 and the internal air outlet 212 are communicated to form a ventilation channel between the upper-layer indirect evaporation unit and the lower-layer indirect evaporation unit. The cooling water outlet through hole and the cooling water inlet through hole are communicated to form a water passing channel between the upper-layer indirect evaporation unit and the lower-layer indirect evaporation unit.

[0017] The containerized cooling tower in the present invention integrates the functional components of the cooling tower into two upper and lower containers, realizing the modular integration of the cooling tower and facilitating the transportation and installation of the cooling tower. The container in this patent is adaptively designed on the basis of a standard container, so that the upper container body has an upper external air inlet, an internal air inlet, an air outlet, a cooling water outlet through hole, and lower screw holes, and the lower container body has a lower external air inlet, an internal air outlet, a cooling water inlet through hole, and upper screw holes. Among them, the upper screw holes and the lower screw holes are used to threadedly fasten and fix the upper and lower container bodies by screws; the water passing channel composed of the cooling water outlet through hole and the cooling water inlet through hole realizes the transportation of the cooling water in the upper container body to the lower container body; the upper external air inlet and the lower external air inlet realize the entry of external air into the indirect evaporation unit in the box body and the evaporation heat exchange cooling with the indirect evaporation unit; the internal air inlet and the internal air outlet are communicated to form a ventilation channel to realize the transportation of the air in the lower container body to the upper container body; the air outlet realizes the transportation of the heat exchange air in the upper container body to the ambient air.

[0018] The upper-layer indirect evaporation unit and the lower-layer indirect evaporation unit together form the cooling system of the cooling tower. The upper-layer indirect evaporation unit mainly plays the role of initially cooling the cooling water and is responsible for the air outlet function. The lower-layer indirect evaporation unit mainly plays the role of secondary cooling the cooling water and transporting the cooling water. By integrating cooling systems with different functions into containers of a certain size, it realizes convenient transportation and rapid installation.

[0019] Regarding how the upper indirect evaporation unit and the lower indirect evaporation unit are arranged in the container and how to achieve various functions, preferably, the upper indirect evaporation unit includes a fan 12 and an upper water distributor 13, an upper filler 14, an upper water receiving tank 15, and a wind valve 16 that are symmetrically arranged about the center. The wind valve 16 is fixedly located at the upper external air inlet 111. The upper filler 14 is located behind the wind valve 16 in the air inlet direction. The upper water distributor 13 is located directly above the upper filler 14 and is fixed to the upper container body 11. The upper water receiving tank 15 is located directly below the upper filler 14 and is fixed to the upper container body 11. The fan 12 is located at the air outlet 113. The lower indirect evaporation unit includes a water storage tank 22 and a lower water distributor 23, a lower filler 24, a surface cooler 26, a heat exchange coil 27, a precooling pump 28, and a cooling pump 29 that are symmetrically arranged about the center. The surface cooler 26 is fixedly located at the lower external air inlet 211. The lower filler 24 is located behind the surface cooler 26 in the air inlet direction. The lower water distributor 23 is located directly above the lower filler 24 and is fixed to the lower container body 21. The water storage tank 22 is located directly below the upper filler 14 and is fixed to the lower container body 21. The heat exchange coils 27 are located on both sides inside the water storage tank 22. The water inlet end of the surface cooler 26 is communicated with the water outlet of the precooling pump 28 through a pipeline. The water inlet of the precooling pump 28 is communicated with one end of the heat exchange coil 27 through a pipeline. The other end of the heat exchange coil 27 is communicated with the water outlet end of the surface cooler 26 through a pipeline. The water inlet end of the cooling pump 29 is communicated with the water storage tank 22 through a pipeline. The water outlet end of the cooling pump 29 is communicated with an external pipeline. The lower water distributor 23 is communicated with the upper water receiving tank 15 through the water passage.

[0020] When the fan is turned on and the wind valve is opened, external air enters the container through the wind valve, the upper external air inlet, and the lower external air inlet. The external air entering through the upper external air inlet undergoes evaporative heat exchange with the warm cooling water in the upper filler, and an isenthalpic process occurs. The temperature of the cooling water decreases and flows into the upper water receiving tank for storage. The upper water receiving tank transports the cooling water to the lower water distributor through the water passage. The lower water distributor sprays the cooling water onto the lower filler, where it undergoes evaporative heat exchange with the external air entering through the lower external air inlet. The temperature of the cooling water further decreases. The external air enters the upper container body through the ventilation passage and is then discharged outside the upper container body through the air outlet. The cooled low-temperature cooling water flows into the water storage tank for storage. There is a heat exchange coil in the water storage tank. The cooling water in the heat exchange coil is pumped by the precooling pump to transport the low-temperature cooling water to the surface cooler to precool the external air entering the lower container body, thereby reducing the temperature of the air undergoing evaporative heat exchange with the filler and further reducing the temperature of the cooling water flowing into the water storage tank. The cooling water in the surface cooler is heated after heat exchange and then returns to the heat exchange coil again, where it is cooled by the cooling water in the water storage tank, and this cycle continues.

[0021] To prevent frosting and icing of the cooling tower in cold winter seasons, preferably, the lower-layer indirect evaporation unit further includes an antifreeze tank 25, which is located above the surface cooler 26, and the outlet of the antifreeze tank 25 is communicated with the liquid inlet end of the surface cooler 26 through a pipeline.

[0022] The cooling water is replaced with antifreeze. In seasons with higher temperatures, it has the same function as the cooling water. In seasons with lower temperatures, the cooling water may freeze in the heat exchange coil and thus cannot be transported to the surface cooler. However, the antifreeze remains in a liquid state below 0°C. In winter, the antifreeze in the heat exchange coil exchanges heat with the outside air below 0°C to raise the temperature, making the outside air above 0°C, so that the air entering the packing does not cause the cooling water in the packing to frost or ice. In winter, the air valve of the upper container body also responds and closes, and the upper-layer indirect evaporation unit does not perform the primary precooling operation.

[0023] In summer, spring, and autumn, the outside hot air exchanges heat and is precooled with the cold antifreeze in the surface cooler. The precooled air exchanges heat and evaporates with the sprinkling water in the packing. After the sprinkling water cools down, it flows into the water receiving area of 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 decreases and is transported to the surface cooler by the precooling water pump to exchange heat with the outside hot air, and so on in a cycle. The cooling water in the water storage tank is pumped to the external pipe network by the cold water pump. Since the hot air that exchanges heat and evaporates with the sprinkling water has a lower temperature after precooling, the outlet temperature of the sprinkling water in the packing is also lower.

[0024] 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 sprinkling water in the packing to gradually form ice slag and ice cubes locally, which has a great impact on the performance of the packing. In the present invention, antifreeze is provided in the heat exchange coil. The antifreeze in the heat exchange coil exchanges heat with the normal water above 10°C in the water storage tank to become about 10°C. The antifreeze at about 10°C is transported to the surface cooler by the precooling water pump to exchange heat with the cold wind below -5°C outside. The cold wind exchanges heat and warms up to warm wind above 0°C and enters the packing. Since the cold wind temperature is above 0°C, the phenomenon that the sprinkling water in the packing freezes into ice slag and ice cubes will not occur.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] By integrating the container body, the cooling tower has achieved integrated modularization, which is convenient for transportation and installation; by placing the heat exchange coil in the water storage tank, the heat exchange coil exchanges heat with the cooling water in the water storage tank, and then pre-cools the hot air in different seasons outside through the heat exchange coil, and heats up the cold air through heat exchange; by setting up an antifreeze water tank and inputting the antifreeze into the heat exchange coil, the heat exchange coil will not freeze in winter, achieving antifreeze in winter and lower outlet water temperature in other seasons.

[0027] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope recorded in this specification.

[0028] The above embodiments only represent the preferred implementation modes of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A containerized indirect evaporative open cooling tower, characterized in that: The open cooling tower includes a docked upper container module and a lower container module. The upper container module includes an upper container body and an upper-layer indirect evaporation unit arranged inside the upper container body. The lower container module includes a lower container body and a lower-layer indirect evaporation unit arranged inside the upper container body. The upper container body has an upper external air inlet, an internal air inlet, an air outlet, a cooling water outlet through hole, and a lower screw hole. The lower container body has a lower external air inlet, an internal air outlet, a cooling water inlet through hole, and an upper screw hole. The upper container body and the lower container body are installed and fixed by screwing the lower screw hole and the upper screw hole. The internal air inlet and the internal air outlet are communicated to form a ventilation channel between the upper-layer indirect evaporation unit and the lower-layer indirect evaporation unit. The cooling water outlet through hole and the cooling water inlet through hole are communicated to form a water passing channel between the upper-layer indirect evaporation unit and the lower-layer indirect evaporation unit.

2. The containerized indirect evaporative open cooling tower according to claim 1, characterized in that: The upper-layer indirect evaporation unit includes a fan and an upper water distributor, an upper filler, an upper water receiving tank, and a wind valve symmetrically arranged around the center. The wind valve is fixedly located at the upper external air inlet. The upper filler is located behind the wind valve in the air inlet direction. The upper water distributor is located directly above the upper filler and is fixed to the upper container body. The upper water receiving tank is located directly below the upper filler and is fixed to the upper container body. The fan is located at the air outlet. The lower-layer indirect evaporation unit includes a water storage tank and a lower water distributor, a lower filler, a surface cooler, a heat exchange coil, a pre-cooling pump, and a cooling pump symmetrically arranged around the center. The surface cooler is fixedly located at the lower external air inlet. The lower filler is located behind the surface cooler in the air inlet direction. The lower water distributor is located directly above the lower filler and is fixed to the lower container body. The water storage tank is located directly below the upper filler and is fixed to the lower container body. The heat exchange coils are located on both sides inside the water storage tank. The water inlet end of the surface cooler is communicated with the water outlet of the pre-cooling pump through a pipeline. The water inlet of the pre-cooling pump is communicated with one end of the heat exchange coil through a pipeline. The other end of the heat exchange coil is communicated with the water outlet end of the surface cooler through a pipeline. The water inlet end of the cooling pump is communicated with the water storage tank through a pipeline. The water outlet end of the cooling pump is communicated with an external pipeline. The lower water distributor is communicated with the upper water receiving tank through the water passing channel.

3. The containerized indirect evaporative open cooling tower according to claim 2, characterized in that: The lower-layer indirect evaporation unit further includes an antifreeze tank located above the surface cooler. The outlet of the antifreeze tank is communicated with the liquid inlet end of the surface cooler through a pipeline.

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