Cross-flow closed cooling tower

Abstract

The utility model discloses a cross-flow closed cooling tower, which comprises a filler cooling section, a heat exchange section and a spraying system, the filler cooling section is arranged at the position close to the upper part in a shell, is positioned on the two sides of an air cavity, and corresponds to air inlets formed on the two sides of the shell; the heat exchange sections are mounted on two sides of the air cavity in the shell, are positioned below the filler cooling section and exchange heat with the spray water cooled by the filler cooling section; and the spraying system circularly sprays the filler cooling section and the heat exchange section. According to the cross-flow closed cooling tower, the filler cooling section and the coil pipe heat exchange section are relatively independent, air cooling only acts on the filler cooling section, and the coil pipe heat exchange section mainly conducts water-water heat exchange through spraying water cooled by the filler cooling section; due to the fact that all air is used for cooling of the filler cooling section, the air cooling efficiency is improved, inlet air is forbidden to penetrate through the coil pipe, spraying water of the coil pipe cooling section naturally falls down along the surface of the coil pipe, coating type water-water heat exchange is formed, and the heat exchange effect can be achieved to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, in particular to a cross-flow closed cooling tower. Background Art

[0002] The main purpose of cooling towers is cooling and heat exchange. They are often used for cooling or condensing liquids and gases in industrial production. Traditional cooling towers mainly include compound closed-flow cooling towers and cross-flow closed-flow cooling towers. Figure 1 As shown, the principle of the existing composite flow closed tower is as follows: 40% of the cold air enters the coil cooler 28 from the cold air inlet 21 of the heat exchange section above the cooling tower, exchanges latent heat and part of sensible heat with the coil cooler 28, becomes a mixture of hot air and water vapor, and is discharged from the hot air outlet 29 in the middle through the exhaust fan 210. 60% of the cold air enters the cooling section 27 from the cold air inlet 25 of the cooling section, exchanges latent heat with the spray water flowing through the cooling section 27, forms a mixture of hot air and water vapor, and is discharged from the hot air outlet 29 through the exhaust fan 210.

[0003] The water flowing down from the cooling section 27 is transported by the spray pump 26, spread through the spray head 22, and forms a water film on the surface of the coil cooler 28 and the cooling section 27, exchanging heat with the cold air.

[0004] During the hot air discharge process, the system heat is taken away, and the spray water is cooled to form low-temperature water, which is transported to the spray head 22 through the pump 26, sprinkled to the coil cooler 28, and exchanges heat between the walls with the medium in the coil cooler 28 to reduce its temperature and achieve the purpose of cooling.

[0005] Since the heat transfer effect of air-water heat exchange is much lower than that of water-water heat exchange, it can be determined based on the change in heat transfer coefficient that the efficiency of air-water heat exchange is equivalent to 5% of that of water-water heat exchange. Therefore, the 40% of cold air of this product can only play a 5% role, and due to the diversion, the lack of air volume in the cooling section needs to be compensated by another 40% of air volume to achieve the set cooling effect. Therefore, for the same cooling effect, the energy consumption increases by 40%. Utility Model Content

[0006] In order to solve the technical problems of low heat exchange efficiency and high cost of cooling towers in the prior art, the utility model provides a cross-flow closed cooling tower.

[0007] The technical solution adopted by the utility model is:

[0008] The utility model proposes a cross-flow closed cooling tower, comprising:

[0009] The shell has an air cavity longitudinally arranged in the middle, a fan with an upward air outlet direction is arranged at the top of the air cavity, and air inlets are arranged at upper positions on both sides of the shell;

[0010] The filler cooling section is installed at the upper part of the shell and located on both sides of the air cavity, and corresponds to the air inlets opened on both sides of the shell;

[0011] The heat exchange section is installed on both sides of the air cavity in the shell and is located below the filler cooling section to exchange heat with the spray water cooled by the filler cooling section;

[0012] The spray system comprises a water collecting tray located below the heat exchange section, a plurality of spray heads located above the packing cooling section, a pipeline connecting the spray heads and the water collecting tray, and a spray pump arranged on the pipeline.

[0013] The area of ​​the shell corresponding to the packing cooling section is a chamber with four sides closed, the heat exchange section is located in the chamber, and the heat exchange inlet and the heat exchange outlet of the heat exchange section pass through the side of the shell.

[0014] The shell is located above the heat exchange section and is provided with a frame for placing the filler cooling section.

[0015] The top of the chamber is in a flared shape, and the top edge of the chamber is directly opposite to the edges around the filler cooling section.

[0016] The water collecting tray is arranged at the bottom of the chamber, or the bottom of the chamber forms the water collecting tray.

[0017] The nozzle is located inside the shell, the upper end of the pipe extends from the outside of the shell into the top of the shell, and a plurality of nozzles are installed on the portion of the pipe extending into the shell; the lower end of the pipe extends from the outside of the shell into the bottom of the shell to connect with the water collecting tray.

[0018] The packing sheet of the packing cooling section is a PVC corrugated sheet.

[0019] Compared with the prior art, the cross-flow closed cooling tower proposed by the utility model has the following advantages:

[0020] 1. The packing cooling section and the coil heat exchange section are relatively independent, and the air cooling only acts on the packing cooling section. The coil heat exchange section mainly performs water-to-water heat exchange through the spray water cooled by the packing cooling section, and the heat exchange efficiency is high. Since all the air volume is used for cooling the packing cooling section, the same fan and cooling effect only require 40% of the air volume. For the same fan, the air volume is proportional to the energy consumption, so it can save about 40% energy.

[0021] 2. The spray water on the surface of the existing cooling tower coil cannot fully cover the coil surface in the ventilation state, and only forms a drop-like distribution. The heat exchange effect cannot be fully exerted, and the maximum surface coverage rate is no more than 60%. The utility model prohibits the incoming air from passing through the coil. The spray water of the coil cooling section flows along the surface of the coil to form a wrapped water-to-water heat exchange. The heat transfer value is only related to the flow rate inside and outside the tube, because the heat exchange effect can be maximized. Therefore, the same coil heat exchange area can improve the heat exchange effect by about 40%. Most coils are made of stainless steel or copper, so the material can be saved by about 40%, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a structural schematic diagram of a composite flow cooling tower in the prior art;

[0024] Figure 2 It is a schematic diagram of the structure in the embodiment of the utility model;

[0025] Figure 3 for Figure 4 BB cross-section diagram;

[0026] Figure 4 for Figure 2 AA cross-sectional diagram of ;

[0027] 1. Fan;

[0028] 2. Nozzle;

[0029] 3. Filler cooling section;

[0030] 4. Air inlet;

[0031] 5. Heat exchange outlet;

[0032] 6. Heat exchange section;

[0033] 7. Heat exchange inlet;

[0034] 8. Water collection tray;

[0035] 9. Spray pump;

[0036] 10. Cooler;

[0037] 11. Filling sheet;

[0038] 12. Spray water;

[0039] 13. Shell; 131. Air cavity. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The principle and structure of the present utility model are described in detail below with reference to the accompanying drawings and embodiments.

[0042] The defect of traditional closed-flow composite cooling tower and cross-flow closed-flow cooling tower is that the heat exchange section is doped with a small amount of cooling function (about 5-10%), and the heat exchange section directly uses air cooling, which has a low cooling efficiency, but wastes about 40% of the air volume. Therefore, the air volume energy consumption needs to be increased by 40-60% in the cooling section to compensate for the air volume loss. Therefore, under the condition of the same cooling efficiency, the energy consumption will increase by 40-60%.

[0043] In this regard, the utility model combines the structures of traditional composite closed-flow cooling towers and cross-flow closed-flow cooling towers, optimizes and improves them, and proposes a cross-flow closed-flow cooling tower, which reduces the air volume and energy consumption of the cooling section and mainly uses water-to-water heat exchange to improve heat exchange efficiency.

[0044] like Figures 2 to 4As shown, the cross-flow closed cooling tower proposed by the utility model specifically includes: a shell 13, a fan 1, a filler cooling section 3, a heat exchange section 6 and a spray system; a wind cavity 131 is longitudinally arranged in the middle of the shell 13, and the top opening of the shell 13 corresponding to the wind cavity 131 is used to install the fan 1, the air outlet direction of the fan 1 is upward, and air inlets are provided at the upper positions on both sides of the shell. Specifically, the positions located on both sides of the wind cavity and corresponding to the air inlets in the shell 13 are filler areas, and the positions located on both sides of the wind cavity 131 and below the filler areas are heat exchange areas, and the outside air is introduced from the air inlets on both sides of the shell through the fan 1, sucked to the wind cavity position through the filler area horizontally, and then led upward from the wind cavity; the filler cooling section 3 is installed in the upper part of the shell and is respectively located at the wind The two sides of the cavity correspond to the air inlets opened on both sides of the shell, that is, the packing area; the air driven by the fan 1 passes through the packing cooling section 3 horizontally, and the area where the packing cooling section 3 is set is air-cooled; the heat exchange section 6 is located in the heat exchange area in the shell, that is, it is respectively located on both sides of the wind cavity and below the packing cooling section 3, and can receive the spray water 12 passing through the packing cooling section 3. The surrounding sides of the shell corresponding to the heat exchange section 6 are in a closed state, that is, they are not affected by the air driven by the fan, and there is no water-air heat exchange; the spray system specifically includes a water collecting tray 8 located below the heat exchange section, and a plurality of nozzles 2 located above the packing cooling section, a pipe connecting the nozzle 2 and the water collecting tray 8, and a spray pump 9 arranged on the pipe to lead the water in the water collecting tray to the nozzle for circulating spraying.

[0045] The specific operation process is as follows: the spray water 12 of the water collecting tray 8 is transported to the nozzle 2 through the spray pump, and then the spray water 12 is sprayed to the packing cooling section 3 below it through the nozzle 2, and a water film is formed on the surface of the packing sheet 11 in the packing cooling section 3. The cold air enters the packing area from the air inlets on both sides of the shell 13 through the fan 1, and passes through the gaps between the packing sheets to exchange latent heat with the water film on the surface of the packing sheets. Part of the spray water evaporates and absorbs heat, and the hot steam and the air after heat exchange are sucked into the wind cavity and then discharged from the top of the shell. The spray water that has been taken away loses heat and its temperature decreases. The spray water after cooling flows into the heat exchange section located in the heat exchange area below, and exchanges heat with the medium inside the heat exchange section through the wall, reducing the temperature of the medium inside the heat exchange section, and realizing closed cooling. The spray water after heat exchange absorbs heat and its temperature increases, and drips down to the water collecting tray, and then is transported to the nozzle through the spray pump, thus forming a continuous cycle process.

[0046] In addition, since part of the spray water will evaporate and be lost, there is a corresponding water replenishment pipeline to replenish the spray water.

[0047] The packing cooling section and heat exchange section of the cross-flow closed cooling tower proposed by the utility model are relatively independent, and the air cooling only acts on the packing cooling section. The heat exchange section mainly performs water-water heat exchange through the spray water cooled by the packing cooling section; since the entire air volume is used for cooling the packing cooling section, the same fan and cooling effect only require 40% of the air volume. For the same fan, the air volume is proportional to the energy consumption, so it can save energy by about 40%. Moreover, in the ventilation state of the coil of the traditional technology, the spray water on the surface cannot completely cover the surface of the coil, and only a drop-like distribution will be formed, and the heat exchange effect cannot be fully exerted. The maximum surface coverage rate is no more than 60%, while the utility model directly prohibits the incoming air from passing through the coil, and the spray water of the coil cooling section flows downward along the surface of the coil to form a coated water-water heat exchange. The heat transfer value is only related to the flow rate inside and outside the tube, because the heat exchange effect can be maximized. Therefore, the same coil heat exchange area can improve the heat exchange effect by about 40%. The coil is mostly made of stainless steel or copper, so the material can be saved by about 40%, reducing the cost.

[0048] In a specific embodiment, the area of ​​the shell 13 corresponding to the heat exchange section 6 is a chamber with closed sides and bottom, and the heat exchange section 6 is located in the chamber. The cooler 10 of the heat exchange section 6 is specifically a heat exchange coil arranged in a serpentine shape, and the heat exchange outlet 5 and the heat exchange inlet 7 of the heat exchange coil pass through the side of the shell, and the passing position is sealed to prevent water from seeping out.

[0049] Furthermore, the top of the chamber is flared, and the top edge of the chamber is directly opposite to the edges of the filler cooling section, so that water passing through the filler cooling section converges into the chamber along the flared opening, thereby increasing the flow rate of the spray water flowing through the heat exchange section and improving the heat exchange efficiency.

[0050] In a specific embodiment, a water collecting tray is arranged at the bottom of the chamber to collect the spray water after heat exchange through the heat exchange section.

[0051] In other embodiments, the bottom of the chamber may be directly used as a water collecting tray for collecting the spray water, without adding any additional structure to reduce the cost.

[0052] The outer wall of the coil of a closed cooling tower is prone to scaling, and the coil of a traditional closed cooling tower needs ventilation, which increases the speed of scaling. At the same time, due to the need for ventilation, it is impossible to form a box. When cleaning the coil, the coil needs to be removed from the tower body and placed in a special cleaning pool for soaking and descaling. However, the cooling section of the utility model is directly set in a chamber that is closed on all sides and at the bottom. The chamber can be directly used as a cleaning pool. The cooling section does not need to be removed from the tower body for descaling. It can be directly soaked and cleaned in the chamber with chemicals, and no additional space and equipment are required.

[0053] The nozzle of the sprinkler system is located inside the shell, and the upper end of the pipe extends from the outside of the shell into the top of the shell 13. Multiple nozzles 2 are installed on the part of the pipe extending into the shell 13. The upper part of the pipe can be supported by a bracket or hoisted in other ways; the lower end of the pipe extends from the outside of the shell into the bottom of the shell and connects to the water collection tray 8.

[0054] Specifically, the filler cooling section 3 includes a plurality of stacked filler sheets 11 , and the filler sheets 11 may specifically be PVC corrugated sheets.

[0055] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cross-flow closed cooling tower, characterized in that: include: The shell has an air cavity longitudinally arranged in the middle, a fan with an upward air outlet direction is arranged at the top of the air cavity, and air inlets are arranged at upper positions on both sides of the shell; The filler cooling section is installed at the upper part of the shell and located on both sides of the air cavity, and corresponds to the air inlets opened on both sides of the shell; The heat exchange section is installed on both sides of the air cavity in the shell and is located below the filler cooling section to exchange heat with the spray water cooled by the filler cooling section; The spray system comprises a water collecting tray located below the heat exchange section, a plurality of spray heads located above the packing cooling section, a pipeline connecting the spray heads and the water collecting tray, and a spray pump arranged on the pipeline.

2. The cross-flow closed cooling tower according to claim 1, characterized in that: The area of ​​the shell corresponding to the packing cooling section is a chamber with four sides closed, the heat exchange section is located in the chamber, and the heat exchange inlet and the heat exchange outlet of the heat exchange section pass through the side of the shell.

3. The cross-flow closed cooling tower according to claim 1, characterized in that: The shell is located above the heat exchange section and is provided with a frame for placing the filler cooling section.

4. The cross-flow closed cooling tower according to claim 2, characterized in that: The top of the chamber is in a flared shape, and the top edge of the chamber is directly opposite to the edges around the filler cooling section.

5. The cross-flow closed cooling tower according to claim 2, characterized in that: The water collecting tray is arranged at the bottom of the chamber, or the bottom of the chamber forms the water collecting tray.

6. The cross-flow closed cooling tower according to claim 1, characterized in that: The nozzle is located inside the shell, the upper end of the pipe extends from the outside of the shell into the top of the shell, and a plurality of nozzles are installed on the portion of the pipe extending into the shell; the lower end of the pipe extends from the outside of the shell into the bottom of the shell to connect with the water collecting tray.

7. The cross-flow closed cooling tower according to claim 1, characterized in that: The packing sheet of the packing cooling section is a PVC corrugated sheet.

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