A cooling triangle with three-dimensional coupling of current equalization and rectification devices

Abstract

The application discloses a cooling triangle with three-dimensional coupling of current equalizing devices and rectifying devices, which comprises a cooling triangle, an upper current equalizing device and a lower rectifying device, wherein the cooling triangle is composed of left and right cooling columns and a louver, and sealing plates are arranged at the upper and lower ends of the cooling triangle; the upper current equalizing device is arranged on the vertical central symmetry plane of the cooling triangle; the lower rectifying device is composed of left and right lower rectifying devices and is arranged on the vertical extension planes of the left end of the left cooling column and the right end of the right cooling column from the outside to the inside, respectively; and a certain horizontal angle exists between the vertical extension planes and the adjacent cooling columns. Generally, the ambient wind is exponentially distributed, the upper ambient wind speed is large, and the lower ambient wind speed is small; the upper side with a large ambient wind speed adopts the upper current equalizing device, and the lower side adopts the lower rectifying device; and through the cooperation of the upper current equalizing device and the lower rectifying device, three-dimensional coupling optimization of the space flow field of the cooling triangle is realized, and the resistance increase caused by the current equalizing device with a small ambient wind speed in the lower space is avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of natural draft air cooling tower of thermal power / nuclear power plant, and particularly relates to a cooling triangle with three-dimensional coupling of flow uniformizing device and flow rectifying device. BACKGROUND

[0002] The natural draft direct air cooling system or the natural draft indirect air cooling system cools the circulating water by the environmental wind, and thus the cooling performance of the natural draft air cooling system is easily affected by the environmental wind. The stability and uniformity of the air volume inside the cooling triangle, which is the core part of the air cooling system, are important factors for determining the heat exchange performance of the cooling triangle. In general, the environmental wind is exponentially distributed, the environmental wind speed on the upper side of the cooling triangle is large, and the environmental wind speed on the lower side is small, so the phenomenon of uneven distribution of the environmental wind entering the tower easily occurs. The air speed on the lower side of the cooling triangle is small, and the use of the flow uniformizing device increases the resistance generated by the environmental wind entering the tower.

[0003] A patent of China, patent number ZL 2015 1 0055635.6, discloses a gas side flow uniformizing device of an indirect air cooling tower heat dissipation cooling triangle, which is composed of at least one group of flow uniformizing components arranged along the circumference of the indirect air cooling tower. Specifically, the cooling triangle is provided with a first flow uniformizing plate in the cavity of the cooling triangle for changing the flow direction of the air entering the cooling triangle. The first flow uniformizing plate is arranged along the middle symmetry plane of the cooling triangle and extends outward to the outside of the cooling triangle. The outer end faces of the cooling columns on the two sides of the cooling triangle are respectively provided with second and third flow uniformizing plates for converging and guiding the incoming air. The second and third flow uniformizing plates are respectively arranged outward along the radial lines of the indirect air cooling tower. The first, second and third flow uniformizing plates are all arranged in the vertical direction. The invention reduces the deviation of the incoming air at the air inlet of the cooling triangle by the cooperation of the three groups of flow uniformizing plates, eliminates the low-speed vortex area of the air in the cooling triangle, and maximizes the flow uniformizing effect on the incoming air of the cooling triangle. The patent improves the internal air flow field of the cooling triangle unit under crosswind conditions and improves the heat exchange effect of the cooling triangle unit and the air cooling tower under strong wind conditions by the flow uniformizing plate. However, the first flow uniformizing plate of the patent is arranged in the cavity of the cooling triangle, and can only distribute the air flow field inside the cooling triangle. In general, the environmental wind is exponentially distributed, the environmental wind speed on the upper side is large, and the environmental wind speed on the lower side is small. The use of the flow uniformizing device inside the cooling triangle increases the resistance generated by the environmental wind entering the tower. The upper flow uniformizing device is used in the cooling triangle with a large environmental wind speed, and the lower flow rectifying device is used on the outside of the cooling triangle with a small environmental wind speed. The upper flow uniformizing device inside the cooling triangle and the lower flow rectifying device on the outside of the cooling triangle avoid the phenomenon of increased resistance of the lower space of the cooling triangle due to the use of the flow uniformizing device under small environmental wind speed, achieve the purpose of three-dimensional coupling optimization of the space flow field of the cooling triangle unit, and improve the cooling performance of the cooling triangle. SUMMARY

[0004] The purpose of the present application is to overcome the problem of increased resistance caused by the flow uniformizing device in the lower space of the cooling triangle when the ambient wind speed is small, and to solve the above problem, the present application provides a cooling triangle with three-dimensional coupling of flow uniformizing device and flow straightening device, comprising a cooling triangle, an upper flow uniformizing device, a lower flow straightening device, and sealing plates at the upper and lower ends, the upper flow uniformizing device is arranged on the vertical center symmetry plane of the cooling triangle, and the left lower flow straightening device and the right lower flow straightening device are arranged on the vertical extension plane inward from the left outer end of the left cooling column and the right outer end of the right cooling column respectively.

[0005] In order to achieve the above purpose, the technical scheme of the present application is as follows: a cooling triangle with three-dimensional coupling of flow uniformizing device and flow straightening device, comprising a cooling triangle, an upper flow uniformizing device, and a lower flow straightening device, characterized in that: the cooling triangle is composed of a left cooling column, a right cooling column, and a louver, and sealing plates are arranged at the upper and lower ends of the cooling triangle; the upper flow uniformizing device is arranged on the vertical center symmetry plane of the cooling triangle; the lower flow straightening device is composed of a left lower flow straightening device and a right lower flow straightening device, and is arranged on the vertical extension plane inward from the left end of the left cooling column and the right end of the right cooling column respectively; the outer side refers to the side where the louver is arranged, and the inner side refers to the side where the left cooling column and the right cooling column are angled.

[0006] The left cooling column, the right cooling column, the louver, the upper sealing plate, and the lower sealing plate are connected to each other to form a closed space with a triangular cross section; the left cooling column and the right cooling column are symmetric about the vertical center symmetry plane of the cooling triangle.

[0007] The upper flow uniformizing device is vertically arranged along the vertical center symmetry plane of the cooling triangle, and the vertical distance between the outer end of the upper flow uniformizing device and the vertical louver of the cooling triangle is Ljb, 0≤Ljb≤0.3m.

[0008] The horizontal length of the upper flow uniformizing device is Lj, and Lj is M / N of L*cos(α / 2), where M is a positive integer greater than or equal to 1, N is a positive integer greater than or equal to 2, and M≤N, N≤100, L is the length of the left cooling column and the right cooling column, and α is the included angle of the horizontal projection of the left cooling column and the right cooling column of the cooling triangle.

[0009] The vertical distance between the bottom end of the upper flow uniformizing device and the lower sealing plate is Hd, and the value of Hd is in the range of 0≤Hd≤1 / 2H; the vertical distance between the top end of the upper flow uniformizing device and the upper sealing plate is Hj, and the value of Hj is in the range of 0≤Hj≤1 / 3H, and H is the vertical distance between the upper sealing plate and the lower sealing plate of the cooling triangle.

[0010] The lower flow uniformizing device is composed of a left lower flow uniformizing device and a right lower flow uniformizing device, the left lower flow uniformizing device is arranged on the vertical extension surface of the left outer end of the left cooling column, and the included angle between the vertical extension surface of the left outer end of the left cooling column and the horizontal projection of the left cooling column is βl, where α / 2-5°≤βl≤α / 2+5°; the right lower flow uniformizing device is arranged on the vertical extension surface of the right outer end of the right cooling column, and the included angle between the vertical extension surface of the right outer end of the right cooling column and the horizontal projection of the right cooling column is βr, where α / 2-5°≤βr≤α / 2+5°, and α is the included angle of the horizontal projection of the left cooling column and the right cooling column of the cooling triangle.

[0011] The horizontal projection distance between the outer end of the left lower flow uniformizing device and the left outer end of the left cooling column is Lwl, and the left lower flow uniformizing device extends vertically inward by a distance Lzl, the value of Lwl is in the range of 0≤Lwl<(1 / X) L*cos(α / 2), where X is an integer greater than or equal to 1, and the value of Lzl is A / B of L*cos(α / 2), where A is a positive integer greater than or equal to 1, B is a positive integer greater than or equal to 2, and A≤B, B≤100, and α is the included angle of the horizontal projection of the left cooling column and the right cooling column of the cooling triangle.

[0012] The horizontal projection distance between the outer end of the right lower flow uniformizing device and the right outer end of the right cooling column is Lwr, and the right lower flow uniformizing device extends vertically inward by a distance Lzr, the value of Lwr is in the range of 0≤Lwr<(1 / X) L*cos(α / 2), where X is an integer greater than or equal to 1, and the value of Lzr is A / B of L*cos(α / 2), where A is a positive integer greater than or equal to 1, B is a positive integer greater than or equal to 2, and A≤B, B≤100, and α is the included angle of the horizontal projection of the left cooling column and the right cooling column of the cooling triangle.

[0013] The vertical distance between the bottom end of the left lower flow uniformizing device and the horizontal extension surface of the lower sealing plate is Hzl, and the value of Hzl is in the range of 0≤Hzl≤1 / 20H; the vertical distance between the bottom end of the right lower flow uniformizing device and the horizontal extension surface of the lower sealing plate is Hzr, and the value of Hzr is in the range of 0≤Hzr≤1 / 20H, and H is the vertical distance between the upper sealing plate and the lower sealing plate of the cooling triangle.

[0014] The left lower rectifier device extends upward along the height direction of the cooling column by a distance Hbl, and the value of Hbl ranges from 1 / 20H to 1 / 2H; the right lower rectifier device extends upward along the height direction of the cooling column by a distance Hbr, and the value of Hbr ranges from 1 / 20H to 1 / 2H, and H is the vertical distance between the upper sealing plate and the lower sealing plate of the cooling triangle.

[0015] Compared with the existing technology, the more prominent effect of the present application is that a cooling triangle with three-dimensional coupling of flow uniformizing devices and rectifier devices, comprising a cooling triangle, an upper flow uniformizing device and a lower rectifier device, the cooling triangle is composed of a left cooling column, a right cooling column and a louver, and is provided with upper and lower sealing plates, the upper flow uniformizing device is arranged on the vertical center symmetry plane of the cooling triangle, the lower rectifier device is composed of a left lower rectifier device and a right lower rectifier device, and is arranged on the vertical extension plane inward of the left outer end of the left cooling column and the right outer end of the right cooling column, respectively, and the vertical extension plane has a certain horizontal angle with the adjacent cooling column. Generally, the ambient wind is exponentially distributed, the upper ambient wind speed is large, and the lower ambient wind speed is small, the upper flow uniformizing device is used on the upper side with large ambient wind speed, and the lower rectifier device is used on the lower side, and through the joint action of the upper flow uniformizing device and the lower rectifier device, the three-dimensional coupling optimization of the cooling triangle space flow field is realized, and the resistance increase caused by the flow uniformizing device under small ambient wind speed is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a cooling triangle with three-dimensional coupling of flow uniformizing devices and rectifier devices.

[0017] Figure 2 It is a structural schematic diagram of a cooling triangle with three-dimensional coupling of flow uniformizing devices and rectifier devices.

[0018] Figure 3 It is a structural schematic diagram of a cooling triangle with three-dimensional coupling of flow uniformizing devices and rectifier devices.

[0019] Figure 4 It is a structural schematic diagram of a cooling triangle with three-dimensional coupling of flow uniformizing devices and rectifier devices.

[0020] 1 - lower rectifier, 2 - bottom end of upper flow equalizer, 3 - louvers, 4 - upper flow equalizer, 5 - bottom end of lower rectifier, 6 - top end of upper flow equalizer, 7 - upper seal plate, 8 - lower seal plate, 9 - vertical extension of right side cooling column right side outer end inward, 10 - outer end of upper flow equalizer, 11 - vertical center plane of cooling triangle, 12 - vertical extension of left side cooling column left side outer end inward, 13 - left side cooling column, 14 - right side cooling column, 15 - outer end of left side lower rectifier, 16 - left side outer end of left side cooling column, 17 - outer end of right side lower rectifier, 18 - right side outer end of right side cooling column, 19 - cooling triangle, 20 - left side lower rectifier, 21 - right side lower rectifier, 22 - right side lower rectifier, 23 - ambient wind direction. DETAILED DESCRIPTION

[0021] The application will be further described in connection with the specific embodiments.

[0022] As Figures 1-2As shown, the present invention discloses a cooling triangle with a three-dimensional coupling function of a flow equalization device and a flow rectifier, comprising a cooling triangle 19, an upper flow equalization device 4, and a lower flow rectifier 1. The cooling triangle 19 consists of a left cooling column 13, a right cooling column 14, and louvers 3. An upper sealing plate 7 and a lower sealing plate 8 are respectively provided at its upper and lower ends. The upper flow equalization device 4 is located on the vertical center symmetry plane 11 of the cooling triangle. The vertical distance between its outer end 10 and the vertical louvers 3 of the cooling triangle ranges from 0 to 0.3 m, and the vertical inward extension ranges from 0 to L*cos(α / 2), where L is the distance between the left cooling column 13 and the upper flow equalization device 4. 3. The length of the right cooling column 14, where α is the angle between the horizontal projections of the left cooling column 13 and the right cooling column 14 of the cooling triangle; the vertical distance between the bottom end 2 of the upper flow equalization device and the lower sealing plate 8 is 0~1 / 2H; the vertical distance between the top end 6 of the upper flow equalization device and the upper sealing plate 7 of the cooling triangle is 0~1 / 3H, where H represents the height of the cooling column; the left lower rectifier 20 is arranged on the vertical extension surface 12 extending inward from the left outer end 16 of the left cooling column; the angle between the vertical extension surface 12 extending inward from the left outer end 16 of the left cooling column and the horizontal projection of the left cooling column 13 is α. / 2-5°~α / 2+5°, the right lower rectifier 21 is arranged on the vertical extension surface 9 extending inward from the right outer end 18 of the right cooling column. The angle between the vertical extension surface 9 extending inward from the right outer end 18 of the right cooling column and the horizontal projection of the right cooling column 14 ranges from α / 2-5° to α / 2+5°. The horizontal projection distance between the outer end 15 of the left lower rectifier and the left outer end 16 of the left cooling column ranges from 0 to L*cos(α / 2), and the vertical inward extension distance ranges from 0 to L*cos(α / 2). The distance between the outer end 17 of the right lower rectifier and the water level at the right outer end 18 of the right cooling column... The range of the horizontal projection distance is 0~L*cos(α / 2), the range of the vertical inward extension distance is 0~L*cos(α / 2), the range of the vertical distance between the bottom end 5 of the left lower rectifier and the horizontal extension surface of the lower sealing plate 8 is 0~1 / 20H, the range of the vertical distance between the bottom end 22 of the right lower rectifier and the horizontal extension surface of the lower sealing plate 8 is 0~1 / 20H, the range of the upward extension distance of the left lower rectifier 20 along the height direction of the cooling column is 1 / 20H~1 / 2H, and the range of the upward extension distance of the right lower rectifier 21 along the height direction of the cooling column is 1 / 20H~1 / 2H.

[0023] Example

[0024] like Figures 3-4 As shown, Figure 3 This is a top view of the upper flow equalization device and the lower flow rectifier under crosswind conditions. Figure 4The cooling triangle with three-dimensional coupling of the uniform flow device and the rectifier device, the upper uniform flow device 4 is arranged on the vertical center symmetry surface 11 of the cooling triangle, the length L of the left cooling column 13 and the right cooling column 14, the height H of the cooling column, the horizontal included angle a formed by the left cooling column 13 and the right cooling column 14 is 60°, the vertical distance between the outer end of the upper uniform flow device and the vertical louver 3 of the cooling triangle is 0.1m, the vertical inward extension distance is 3 / 4L, the vertical distance between the bottom end 2 of the upper uniform flow device and the lower sealing plate 8 is 1 / 3H, the vertical distance between the top end 6 of the upper uniform flow device and the upper sealing plate 7 of the cooling triangle is 1 / 10H, the left lower rectifier device 20 is arranged on the vertical extension surface 12 inward of the left outer end 16 of the left cooling column, the included angle between the vertical extension surface 12 inward of the left outer end 16 of the left cooling column and the horizontal projection of the left cooling column 13 is 30°, the right lower rectifier device 21 is arranged on the vertical extension surface 9 inward of the right outer end 18 of the right cooling column, the included angle between the vertical extension surface 9 inward of the right outer end 18 of the right cooling column and the horizontal projection of the right cooling column 14 is 30°, the distance between the outer end 15 of the left lower rectifier device and the outer end 16 of the left cooling column is 0m, the vertical inward extension distance is 2 / 3L, the distance between the outer end 17 of the right lower rectifier device and the outer end 18 of the right cooling column is 0m, the vertical inward extension distance is 2 / 3L, the vertical distance between the bottom end 5 of the left lower rectifier device and the horizontal extension surface of the lower sealing plate 8 of the cooling triangle is 1 / 30H, the upward extension distance along the height direction of the cooling column is 1 / 4H, the vertical distance between the bottom end 22 of the right lower rectifier device and the horizontal extension surface of the lower sealing plate 8 of the cooling triangle is 1 / 30H, the upward extension distance along the height direction of the cooling column is 1 / 4H.

[0025] Under the crosswind condition, the environmental wind direction 23 is parallel to the louver 3, the environmental wind enters the cooling triangle 19 through the louver 3, under the action of the upper uniform flow device 4, the upper side wind of the cooling triangle is evenly distributed to the left and right cooling columns, after the lower environmental wind direction 23 passes through the left and right cooling columns, it flows out along the horizontal direction of the rectifier device 1, under the joint action of the upper uniform flow device and the lower rectifier device, the three-dimensional coupling optimization of the space flow field of the cooling triangle is realized, and the resistance increase caused by the uniform flow device under the small environmental wind speed in the lower space is avoided.

[0026] The cooling triangle with three-dimensional coupling of current sharing device and rectifying device comprises a cooling triangle, an upper current sharing device and a lower rectifying device, the cooling triangle is composed of a left cooling column, a right cooling column and a louver, sealing plates are arranged at the upper and lower ends of the cooling triangle, the upper current sharing device is arranged on the vertical central symmetry plane of the cooling triangle, the lower rectifying device is composed of a left lower rectifying device and a right lower rectifying device, and is arranged on the vertical extension plane of the left outer end of the left cooling column and the right outer end of the right cooling column respectively, the three-dimensional coupling optimization of the space flow field of the cooling triangle is realized through the joint action of the upper current sharing device and the lower rectifying device, and the resistance increase caused by the current sharing device in the lower space due to the small environmental wind speed is avoided.

[0027] The basic principles, main features and advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application; therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims should be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0028] In addition, it should be understood that although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A cooling triangle with a three-dimensionally coupled flow equalization device and a flow rectifier, comprising a cooling triangle, an upper flow equalization device, and a lower flow rectifier; characterized in that: The cooling triangle consists of a left cooling column, a right cooling column, and louvers, with upper and lower sealing plates at the top and bottom. The upper flow equalization device is arranged on the vertical center symmetrical plane of the cooling triangle. The lower rectifier consists of a left lower rectifier and a right lower rectifier, respectively arranged on the vertical extension surface from the outside to the inside at the left end of the left cooling column and on the vertical extension surface from the outside to the inside at the right side of the right cooling column. The outside refers to the side where the louvers are arranged, and the inside refers to the side where the left and right cooling columns form an angle. The left cooling column, right cooling column, louvers, upper sealing plate, and lower sealing plate intersect each other in a [missing information - likely a specific configuration]. The cooling system forms a triangular closed space. The left and right cooling columns are symmetrical about the vertical center of the cooling triangle. The upper flow equalization device is vertically arranged along the vertical center symmetry plane of the cooling triangle, and the vertical distance between its outer end and the vertical louver of the cooling triangle is Ljb, where 0≤Ljb≤0.3m. The horizontal length of the upper flow equalization device is Lj, where Lj is L*cos(α / 2) / M / N, where M is a positive integer greater than or equal to 1, N is a positive integer greater than or equal to 2, and M≤N, N≤100, L is the length of the left and right cooling columns, and α is the angle between the horizontal projections of the left and right cooling columns of the cooling triangle.

2. The cooling triangle with a flow equalization device and a flow rectifier that can be three-dimensionally coupled, as described in claim 1, is characterized in that: The vertical distance between the bottom of the upper flow equalization device and the lower sealing plate is Hd, and the value of Hd is in the range of 0≤Hd≤1 / 2H; the vertical distance between the top of the upper flow equalization device and the upper sealing plate is Hj, and the value of Hj is in the range of 0≤Hj≤1 / 3H, where H is the vertical distance between the upper and lower sealing plates of the cooling triangle.

3. The cooling triangle with a flow equalization device and a flow rectifier that can be three-dimensionally coupled, as described in claim 1, is characterized in that: The lower rectifier consists of a left lower rectifier and a right lower rectifier. The left lower rectifier is arranged on the vertical extension surface extending inward from the left outer end of the left cooling column. The angle between the vertical extension surface extending inward from the left outer end of the left cooling column and the horizontal projection of the left cooling column is βl, where α / 2-5°≤βl≤α / 2+5°. The right lower rectifier is arranged on the vertical extension surface extending inward from the right outer end of the right cooling column. The angle between the vertical extension surface extending inward from the right outer end of the right cooling column and the horizontal projection of the right cooling column is βr, where α / 2-5°≤βr≤α / 2+5°, and α is the angle between the horizontal projections of the left and right cooling columns of the cooling triangle.

4. A cooling triangle with a flow equalization device and a flow rectifier that can be three-dimensionally coupled, as described in claim 1, is characterized in that: The horizontal projection distance between the outer end of the left lower rectifier and the outer end of the left cooling column is Lwl, and it extends vertically inward by a certain distance Lzl. Lwl is 0≤Lwl<(1 / X)L*cos(α / 2), where X is an integer greater than or equal to 1. Lzl is A / B of L*cos(α / 2), where A is a positive integer greater than or equal to 1, B is a positive integer greater than or equal to 2, and A≤B, B≤100. α is the angle between the horizontal projections of the left and right cooling columns of the cooling triangle.

5. A cooling triangle with a flow equalization device and a flow rectifier that can be three-dimensionally coupled, as described in claim 1, characterized in that: The horizontal projection distance between the outer end of the right lower rectifier and the outer end of the right cooling column is Lwr, and it extends vertically inward by a certain distance Lzr. Lwr is 0≤Lwr<(1 / X)L*cos(α / 2), where X is an integer greater than or equal to 1. Lzr is A / B of L*cos(α / 2), where A is a positive integer greater than or equal to 1, B is a positive integer greater than or equal to 2, and A≤B, B≤100. α is the angle between the horizontal projections of the left and right cooling columns of the cooling triangle.

6. A cooling triangle with a flow equalization device and a flow rectifier that can be three-dimensionally coupled, as described in claim 1, characterized in that: The vertical distance between the bottom end of the left lower rectifier and the horizontal extension surface of the lower sealing plate is Hzl, and the value of Hzl is in the range of 0≤Hzl≤1 / 20H; the vertical distance between the bottom end of the right lower rectifier and the horizontal extension surface of the lower sealing plate is Hzr, and the value of Hzr is in the range of 0≤Hzr≤1 / 20H, where H is the vertical distance between the upper sealing plate and the lower sealing plate of the cooling triangle.

7. A cooling triangle with a flow equalization device and a flow rectifier that can be three-dimensionally coupled, as described in claim 1, characterized in that: The left lower rectifier extends upward along the height of the cooling column by a distance Hbl, where the value of Hbl is in the range of 1 / 20H ≤ Hbl ≤ 1 / 2H; the right lower rectifier extends upward along the height of the cooling column by a distance Hbr, where the value of Hbr is in the range of 1 / 20H ≤ Hbr ≤ 1 / 2H, where H is the vertical distance between the upper and lower sealing plates of the cooling triangle.

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