Indirect air cooling tower with water-saving function

Abstract

The indirect air cooling tower with the water-saving function comprises a tower body and a water collecting tank, a water collecting tank is arranged on the tower bottom wall of the tower body, the water collecting tank is provided with a notch for water to enter, the water collecting tank is communicated with the water collecting tank, and the tank bottom wall of the water collecting tank is lower than the tank bottom wall of the water collecting tank. According to the indirect air cooling tower with the water-saving function, a large amount of cleaning sewage generated by high-pressure cleaning of the finned tubes of the tower body can flow into the water collecting tank through the notch, then flows into the water collecting tank under the action of gravity to be stored, and can be recycled after being treated, so that the water-saving effect can be achieved, waste of water resources is reduced, and the water-saving effect is achieved. The power generation cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of air cooling towers in thermal power plants, and in particular to an indirect air cooling tower with a water-saving function. Background Art

[0002] Indirect air-cooling towers use ambient air to cool the circulating water in the pipes, which has a significant water-saving effect. They have been widely used in thermal power plants in coal-rich and water-scarce areas in northern my country. Because the air contains impurities such as dust and gravel, it is easy to cause blockage between the fin tubes of the indirect air-cooling tower, resulting in a decrease in the heat exchange performance of the indirect air-cooling tower. Therefore, power plants need to perform high-pressure cleaning of the fins from time to time (mainly in summer, during the transition between spring and summer, and during the transition between summer and autumn) according to the operating conditions of the indirect air-cooling tower. After cleaning, the sewage is directly discharged, resulting in a large amount of water resource waste, increasing the cost of power generation, and is not conducive to energy saving and consumption reduction in thermal power plants. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes an indirect air-cooling tower with a water-saving function. A large amount of cleaning wastewater generated by high-pressure cleaning of the fin tubes of the tower body can flow into the water collecting tank through the notch, and then flow into the water collecting tank under the action of gravity for storage. After treatment, it can be recycled, thereby achieving a water-saving effect, reducing water resource waste, and reducing power generation costs.

[0005] The indirect air-cooling tower with water-saving function in an embodiment of the present invention comprises a tower body and a water collecting tank. The bottom wall of the tower body is provided with a water collecting tank, the water collecting tank has a slot for water to enter, the water collecting tank is connected to the water collecting tank, and the bottom wall of the water collecting tank is lower than the bottom wall of the water collecting tank.

[0006] In some embodiments, the indirect air cooling tower with water-saving function further includes a water pump, and the inlet of the water pump is connected to the water collection tank.

[0007] In some embodiments, a water level monitoring device is provided in the water collection tank, and the water level monitoring device is electrically connected to the water pump.

[0008] In some embodiments, the indirect air-cooling tower with water-saving function further includes a sewage purification device, and the sewage purification device is connected to the outlet of the water pump.

[0009] In some embodiments, the bottom wall of the water collection pool is tilted so that the bottom wall has a low-level area and a high-level area, and the inlet of the water pump extends to the low-level area.

[0010] In some embodiments, the indirect air cooling tower with water-saving function further includes a filter layer, at least a portion of which covers the notch.

[0011] In some embodiments, at least a portion of the filter layer is laid on the bottom wall of the tower body.

[0012] In some embodiments, the bottom wall of the tower body includes a first part and a second part, the second part is lower than the first part, and the water collecting tank is arranged in the second part.

[0013] In some embodiments, the tower bottom wall is conical, a central area of ​​the tower bottom wall forms the first portion, an edge area of ​​the tower bottom wall forms the second portion, and the second portion is arranged around the first portion.

[0014] In some embodiments, the water collecting trough extends in a ring shape along the circumference of the tower body, and the water collecting trough has a connecting port connected to the water collecting tank. The bottom wall of the water collecting trough is inclined along the circumference of the tower body so that the bottom wall of the water collecting trough has a highest position and a lowest position, and the connecting port is arranged at the lowest position.

[0015] The indirect air-cooling tower with water-saving function in the embodiment of the present invention can allow a large amount of cleaning wastewater generated by high-pressure cleaning of the fin tubes of the tower body to flow into the water collecting tank through the notch, and then flow into the water collecting tank for storage under the action of gravity. It can be recycled after treatment, thereby achieving water-saving effects, reducing water resource waste, lowering power generation costs, and being more conducive to energy conservation and consumption reduction in thermal power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an indirect air cooling tower with a water-saving function according to an embodiment of the present invention.

[0017] Figure 2 It is a schematic projection diagram of an indirect air cooling tower with a water-saving function on a horizontal plane according to an embodiment of the present invention.

[0018] Reference numerals:

[0019] 100. Indirect air cooling tower;

[0020] 1. tower body; 11. tower bottom wall; 111. first part; 112. second part; 12. water collecting tank; 121. notch; 122. tank bottom wall; 123. connecting port; 13. tower; 14. fin tube; 15. filter layer;

[0021] 2. water collection pool; 21. pool bottom wall;

[0022] 3. Water pump;

[0023] 4. Water level monitoring device;

[0024] 5. Sewage purification device. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figure 1 As shown, the indirect air cooling tower 100 with water-saving function according to an embodiment of the present invention comprises a tower body 1 and a water collecting tank 2. The bottom wall 11 of the tower body 1 is provided with a water collecting trough 12. The water collecting trough 12 has a slot 121 for water to enter. The water collecting tank 2 is connected to the water collecting trough 12. The bottom wall 21 of the water collecting tank 2 is lower than the bottom wall 122 of the water collecting trough 12.

[0027] like Figure 1 As shown, it is known that the tower body 1 includes a tower 13 and a cooling triangular fin tube 14 arranged at the bottom of the tower 13. The number of the fin tubes 14 is multiple, and the multiple fin tubes 14 are arranged along the circumference of the tower 13. The circulating water flows inside the fin tubes 14, and the heat of the circulating water is transferred to the surface of the fin tubes 14. The ambient air flows through the surface of the fin tubes 14 to take away the heat of the circulating water, thereby realizing the cooling of the circulating water; when the fin tubes 14 of the tower body 1 are high-pressure cleaned, impurities such as dust and gravel in the gaps between adjacent fin tubes 14 are cleaned by high-pressure water. At the same time, the water flow can take away the heat on the surface of the fin tubes 14, thereby accelerating the cooling of the circulating water.

[0028] In the indirect air-cooling tower 100 with a water-saving function in the embodiment of the present invention, a large amount of cleaning wastewater generated by high-pressure cleaning of the fin tubes 14 of the tower body 1 can flow into the water collecting tank 12 through the notch 121, and then flow into the water collecting tank 2 under the action of gravity for storage. After being treated, it can be recycled, thereby achieving a water-saving effect, reducing water resource waste, reducing power generation costs, and being more conducive to energy saving and consumption reduction in thermal power plants.

[0029] In addition, rainwater can also flow into the water collection tank 2 through the water collection tank 12 and be recycled after being treated, thereby further saving water and reducing the waste of water resources.

[0030] It is understandable that the high-pressure cleaning of the fin tubes 14 is mainly performed in the summer, the transition between spring and summer, and the transition between summer and autumn, and is not performed in the winter, so as to prevent the fin tubes from freezing due to low-temperature cleaning.

[0031] As an example, Figure 1 and Figure 2As shown, the water collecting pool 2 is arranged at one side of the tower body 1 and is formed by digging downward from the ground, and the top of the water collecting pool 2 is lower than the water collecting tank 12; a connecting passage is arranged between the water collecting pool 2 and the water collecting tank 12, and the water in the water collecting tank 12 flows into the water collecting pool 2 through the connecting passage. In addition, an inspection port is arranged at the top of the water collecting pool 2, so that the inspection port can be opened for inspection when a fault occurs in the water collecting pool 2.

[0032] In some embodiments, Figure 1 As shown, the indirect air cooling tower 100 with water-saving function further includes a water pump 3 , and the inlet of the water pump 3 is connected to the water collection tank 2 .

[0033] By providing a water pump 3, the sewage collected in the water collection tank 2 can be pumped out for further treatment and recycling.

[0034] Alternatively, if Figure 1 As shown, the water pump 3 is a submersible pump 3 and is installed in the water collection tank 2.

[0035] Thereby, the ground installation space can be saved. Meanwhile, the noise generated by the operation of the submersible pump 3 can be absorbed by the water in the sump 2, thereby reducing the impact on the surrounding environment.

[0036] In some embodiments, a water level monitoring device 4 is provided in the water collection tank 2 , and the water level monitoring device 4 is electrically connected to the water pump 3 .

[0037] By setting up a water level monitoring device 4, the water level of the water collection tank 2 can be monitored in real time. When the water level of the water collection tank 2 exceeds the high water level preset value, the water pump 3 automatically starts to pump out the sewage in the water collection tank 2 to prevent the sewage in the water collection tank 2 from overflowing. When the water level of the water collection tank 2 is lower than the low water level preset value, the water pump 3 stops running.

[0038] Optionally, the water level monitoring device 4 is a water level meter.

[0039] In some embodiments, Figure 1 and Figure 2 As shown, the indirect air cooling tower 100 with water-saving function further includes a sewage purification device 5 , and the sewage purification device 5 is connected to the outlet of the water pump 3 .

[0040] When the water level of the water collection tank 2 exceeds the high water level preset value, the water pump 3 automatically starts to pump the sewage in the water collection tank 2 into the sewage purification device 5. The sewage purification device 5 can further purify the sewage to improve the cleanliness of the sewage. The water treated by the sewage purification device 5 can be sent to the water storage tank or directly used in the water use process.

[0041] Alternatively, if Figure 1 As shown, the outlet of the water pump 3 is connected to the sewage purification device 5 through a pipeline.

[0042] In some embodiments, the bottom wall 21 of the water collection pool 2 is tilted so that the bottom wall 21 of the water collection pool 2 has a low-lying area with a lower terrain and a high-lying area with a higher terrain, and the inlet of the water pump 3 extends to the low-lying area.

[0043] Through the above arrangement, when the amount of water in the water collection tank 2 is small, the sewage can be collected in the low-level area under the action of gravity, which is more conducive to pumping out the sewage in the water collection tank 2 through the water pump 3.

[0044] In some embodiments, Figure 1 As shown, the indirect air cooling tower 100 with water-saving function further includes a filter layer 15 , and at least a portion of the filter layer 15 covers the notch 121 .

[0045] Through the above arrangement, rainwater or cleaning sewage needs to be filtered through the filter layer 15 before flowing into the collection tank. Impurities such as dust and gravel in the water are isolated by the filter layer 15, so that preliminary treatment of sewage can be achieved, and impurities can be prevented from clogging the connecting channel and the water pump 3, thereby increasing the service life of the water pump 3. At the same time, preliminary treatment of water resources can be achieved, which can simplify the subsequent treatment steps of water resources.

[0046] In some embodiments, Figure 1 As shown, at least a portion of the filter layer 15 is laid on the bottom wall 11 of the tower body 1 .

[0047] By laying the filter layer 15 on the bottom wall 11 of the tower, the filtering area for water can be increased, and the cleaning sewage and rainwater can be filtered in the process of flowing toward the slot 121, so that impurities such as dust and gravel are distributed in a position far away from the slot 121, thereby reducing the risk of impurities accumulating above the slot 121 and causing blockage of the filter layer 15 above the slot 121.

[0048] As an example, Figure 1 As shown, the filter layer 15 matches the shape of the tower bottom wall 11 , and the filter layer 15 is laid on the upper side of the tower bottom wall 11 and can completely cover the tower bottom wall 11 and the notch 121 .

[0049] Optionally, the filter layer 15 includes a plurality of filter material layers, with a coarser filter material layer arranged at the upper layer and a finer filter material layer arranged at the lower layer.

[0050] Thus, the upper filter material layer of the filter layer 15 can filter large particle impurities in the sewage, and the lower filter material layer can further process the impurities in the sewage.

[0051] Optionally, the filter materials are all reusable materials.

[0052] In some embodiments, the tower body 1 has a tower bottom wall 11 , the tower bottom wall 11 includes a first portion 111 and a second portion 112 , the second portion 112 is lower than the first portion 111 , and the water collecting tank 12 is disposed in the second portion 112 .

[0053] Through the above arrangement, the cleaning sewage and rainwater falling into the bottom wall 11 of the tower can automatically gather to the second part 112 under the action of gravity, and flow into the water collecting trough 12 through the groove 121, and then gather in the water collecting pool 2, thereby realizing the automatic collection of cleaning sewage and rainwater.

[0054] In some embodiments, Figure 1 As shown, the tower bottom wall 11 is conical, the central area of ​​the tower bottom wall 11 forms a first part 111 , and the edge area of ​​the tower bottom wall 11 forms a second part 112 . The second part 112 is arranged around the first part 111 .

[0055] Through the above arrangement, the cleaning sewage or rainwater flows from the central area of ​​the tower bottom wall 11 to the edge area of ​​the tower bottom wall 11 under the action of gravity, and then flows into the water collecting tank 12.

[0056] In some embodiments, Figure 1 and Figure 2 As shown, the water collecting trough 12 extends in a ring shape along the circumference of the tower body 1, and the water collecting trough 12 has a connecting port 123 connected to the water collecting pool 2. The bottom wall 122 of the water collecting trough 12 is inclined along the circumference of the tower body 1 so that the bottom wall 122 of the water collecting trough 12 has a highest position and a lowest position, and the connecting port 123 is arranged at the lowest position.

[0057] Through the above arrangement, the sewage flowing into the water collecting tank 12 can automatically gather to the lowest position of the water collecting tank 12 under the action of gravity, and then flow into the water collecting tank 2 through the connecting port 123, thereby further improving the water resource collection capacity of the indirect air cooling tower 100.

[0058] As an example, Figure 1 and Figure 2 As shown, the tower bottom wall 11 is conical, and its central area is higher to form a first part 111. The tower bottom wall 11 gradually extends downward from the inside to the outside along its own radial direction to form an annular second part 112; the water collecting trough 12 has the same extension direction as the second part 112 of the tower bottom wall 11, that is, the water collecting trough 12 surrounds the edge of the tower bottom wall 11.

[0059] The upper side of the water collecting trough 12 is open to form the above-mentioned notch 121. The notch 121 of the water collecting trough 12 surrounds the tower bottom wall 11. The cleaning sewage or rainwater flows from the center to the surroundings along the conical surface of the tower bottom wall 11. Water from all directions can flow into the water collecting trough 12 through the notch 121, thereby improving the collection efficiency of water resources.

[0060] It can be understood that the connection port 123 is formed at the junction of the connecting passage and the water collecting tank 12 .

[0061] Of course, in other embodiments, the tower bottom wall 11 may also be conical and its central area is at the lowest position (that is, the central area of ​​the tower bottom wall 11 is concave). At this time, the central area of ​​the tower bottom wall 11 forms the second part 112, and the edge area of ​​the tower bottom wall 11 forms the first part 111. The water collecting trough 12 is arranged in the central area of ​​the tower bottom wall 11. Water gathers from the edge area of ​​the tower bottom wall 11 to the central area and flows into the water collecting tank 2 through the water collecting trough 12.

[0062] By setting the connecting port 123 at the lowest position of the bottom wall 122 of the tank, all the water in the water collecting tank 12 is finally collected at the connecting port 123 and flows into the water collecting tank 2 through the connecting channel, thereby further improving the water resource collection capacity and collection efficiency of the indirect air cooling tower 100.

[0063] As an example, Figure 1 As shown, the highest position and the lowest position of the tower bottom wall are arranged relatively on both sides of the tower bottom wall along the radial direction of the tower bottom wall, and the height of the tower bottom wall gradually decreases from the highest position to the lowest position.

[0064] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0069] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An indirect air cooling tower (100) with water-saving function, characterized in that: The invention comprises a tower body (1) and a water collecting pool (2), wherein the bottom wall (11) of the tower body (1) is provided with a water collecting groove (12), the water collecting groove (12) has a notch (121) for water to enter, the water collecting pool (2) is connected to the water collecting groove (12), and the bottom wall (21) of the water collecting pool (2) is lower than the bottom wall (122) of the water collecting groove (12).

2. The indirect air cooling tower (100) with water-saving function according to claim 1, characterized in that: It also comprises a water pump (3), the inlet of the water pump (3) being in communication with the water collecting tank (2).

3. The indirect air cooling tower (100) with water-saving function according to claim 2, characterized in that: A water level monitoring device (4) is provided in the water collection tank (2), and the water level monitoring device (4) is electrically connected to the water pump (3).

4. The indirect air cooling tower (100) with water-saving function according to claim 2, characterized in that: It also comprises a sewage purification device (5), wherein the sewage purification device (5) is connected to the outlet of the water pump (3).

5. The indirect air cooling tower (100) with water-saving function according to claim 2, characterized in that: The bottom wall (21) of the water collection pool (2) is arranged to be inclined so that the bottom wall (21) has a low position area and a high position area, and the inlet of the water pump (3) extends to the low position area.

6. The indirect air cooling tower (100) with water-saving function according to claim 1, characterized in that: It also comprises a filter layer (15), at least a portion of which covers the notch (121).

7. The indirect air cooling tower (100) with water-saving function according to claim 6, characterized in that: At least a portion of the filter layer (15) is laid on the bottom wall (11) of the tower body (1).

8. The indirect air cooling tower (100) with water-saving function according to any one of claims 1 to 7, characterized in that: The tower bottom wall (11) of the tower body (1) comprises a first part (111) and a second part (112), the second part (112) is lower than the first part (111), and the water collecting tank (12) is arranged in the second part (112).

9. The indirect air cooling tower (100) with water-saving function according to claim 8, characterized in that: The tower bottom wall (11) is conical, the central area of ​​the tower bottom wall (11) forms the first part (111), the edge area of ​​the tower bottom wall (11) forms the second part (112), and the second part (112) is arranged around the first part (111).

10. The indirect air cooling tower (100) with water-saving function according to claim 9, characterized in that: The water collecting trough (12) extends in a ring shape along the circumference of the tower body (1), and the water collecting trough (12) has a connecting port (123) connected to the water collecting pool (2). The bottom wall (122) of the water collecting trough (12) is arranged to be inclined along the circumference of the tower body (1), so that the bottom wall (122) of the water collecting trough (12) has a highest position and a lowest position, and the connecting port (123) is arranged at the lowest position.

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