CN218410792U - Arc water distribution pipe reverse water distribution cooling tower - Google Patents
Arc water distribution pipe reverse water distribution cooling tower Download PDFInfo
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- CN218410792U CN218410792U CN202221206514.9U CN202221206514U CN218410792U CN 218410792 U CN218410792 U CN 218410792U CN 202221206514 U CN202221206514 U CN 202221206514U CN 218410792 U CN218410792 U CN 218410792U
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Abstract
The utility model relates to a large and medium-sized industrial cooling tower technical field, in particular to arc water distribution pipe reverse water distribution cooling tower, including the cooling tower body and set up in the central shaft that the cooling tower body intermediate position is vertical extension arrangement, central shaft upper portion is equipped with along its circumference interval arrangement, and along the water delivery groove of cooling tower body radial outside extension, the overhang of water delivery groove is equipped with a main basin, the main basin is followed the cooling tower body radial inside extension arrangement and its one end that is close to the central shaft is sealed, be equipped with along its length direction interval arrangement and along the arc water distribution pipe of the circumferential extension of cooling tower body on the main basin, the overhang of arc water distribution pipe is sealed and is equipped with the splash device of a plurality of interval arrangements on its body; the utility model provides the high basic heat exchange efficiency of large-and-medium-sized natural draft cooling tower improves the work efficiency of cooling tower under the variable working condition, improves the frostproofing ability of cooling tower when winter low temperature simultaneously.
Description
Technical Field
The utility model relates to a large and medium-sized industry cooling tower technical field, in particular to reverse water distribution cooling tower of arc water distribution pipe.
Background
The heat released by a condenser in the Rankine cycle of the thermal power plant is mostly discharged to the external environment by a natural ventilation cooling tower, so that the performance of the natural ventilation cooling tower influences the water inlet temperature of circulating water of the condenser, and further influences the vacuum of a unit and the operation economy of the unit.
The existing natural draft cooling tower mainly comprises a hyperbolic cooling tower barrel, a reservoir, a central vertical shaft, a main water tank, a water distribution pipe, a splashing device, a packing layer and the like. In the operation process of the natural draft cooling tower, circulating cooling water (hot water) passes through the central vertical shaft, the main water tank and the water distribution pipe, is sprayed out by the spraying device and falls on the surface of the water spraying filler, and in the filler area, the cooling water flows through the surface of the filler in a thin film mode to transfer heat and mass with air; below the filler area, the cooling water is gathered into liquid drops and falls into the reservoir in the form of raindrops, and the raindrops perform contact heat exchange with cold air in the falling process.
The central vertical shaft of the natural ventilation cooling tower is a vertical shaft, the bottom of the vertical shaft is connected with a circulating water pressure pipe, the top of the vertical shaft is of an open structure, hot water is sent to a water distribution elevation through the vertical shaft, the water is sent to a water distribution pipe through a main water tank, and then the water is sprayed on the filler through a spraying device arranged on the water distribution pipe. The main water tank, the water distribution pipe and the splashing device arranged on the water distribution pipe jointly form water distribution of the cooling tower, and whether the water distribution of the cooling tower is reasonable or not directly determines the performance of the cooling tower.
The main characteristics of the large-scale natural draft cooling tower water distribution of the cross-shaped main water tank of the existing central vertical shaft include: (1) water distribution arrangement of a large natural ventilation cooling tower: the inner square and the outer circle are distributed in a copper pattern, are usually partitioned at the radius of 1/2, and are a square with the radius of 1/2 multiplied by the radius of 1/2 from the central vertical shaft to the radius of 1/2; the part with the radius of 1/2 to the inner wall of the cooling tower is an outer area, the shape is the circle minus the rest part of the inner area, and the flow direction of water flows from inside to outside; (2) water flow direction of the main water tank: the water flows from inside to outside; due to the continuous diversion of the water distribution pipe, the water flowing in the main water tank is continuously reduced. (3) Under the non-rated working condition, the far end or the tail end of the main water tank has the condition of little water, even no water, so that a water distribution pipe connected with the far end or the tail end of the main water tank has no water or little water, and further the outer area of the cooling tower has no water or little water, the air is in short circuit in the area, the average temperature of the air out of the tower is reduced, the suction force of the cooling tower is reduced, and the performance of the cooling tower is deteriorated; (4) radial air volume of cooling tower: the air flows from outside to inside, and the air needs to pass through a rain zone to reach the inside of the cooling tower, so that the air quantity is less towards the inside of the cooling tower and is continuously gradually changed. The air volume is the largest in the outer edge area of the cooling tower. (5) For the cooling tower with water distribution in inner square and outer circle and inner and outer zones, the water distribution is not continuously and gradually changed and has step change; and (6) a straight water distribution pipe. The length changes of the adjacent water distribution pipes are not continuous or gradual; (7) The water distribution of the cooling tower is designed according to the equal water spraying density of the whole tower, and the structural characteristic of the natural draft cooling tower that the air quantity is gradually reduced from outside to inside along the radius direction of the cooling tower is not fully utilized.
In the prior art, a cooling tower is designed under the working condition of 100% rated circulating cooling water flow, and as new energy power generation rises rapidly, a thermal power generating unit operates under partial load most of the time, and a circulating water pump is mostly subjected to double-speed or variable-frequency energy-saving transformation due to the power-saving requirement of a power plant, so that the circulating water quantity can be matched with the load of the unit at any time, and the economic operation of circulating water under the conditions of meeting the vacuum and safety of the unit is realized.
Based on the above-mentioned current situation, the problems of the existing cooling tower include: (1) Due to unreasonable water distribution, a water-free or weak water area exists outside the water distribution area of the cooling tower, and the phenomenon is particularly serious under the non-rated working condition.
(2) The water quantity of the cooling tower along the radius direction is opposite to the air quantity change, and the water quantity is small on the contrary in the place with large air quantity, so that the heat exchange efficiency is not high;
(3) Under partial load, the existence of a weak water area of a water distribution outer area and a water-free area of a cooling tower can be caused by the condition of little water at the far end or the tail end of a main water tank even under the condition of no water, so that air short circuit is caused, the temperature of air discharged from the cooling tower is reduced, the draft of the cooling tower is reduced, the air quantity entering the tower is reduced, and the performance of the cooling tower is deteriorated;
(4) When the environmental temperature is low in winter, the cooling water quantity of the cooling tower is small, and the periphery of the cooling tower is frozen due to insufficient cooling water (hot water), so that extra measures must be taken for freezing prevention. Due to the large construction of the cooling tower itself, the cost is expensive regardless of the measures taken.
SUMMERY OF THE UTILITY MODEL
To the problem among the prior art, an object of the utility model is to provide an arc water distribution pipe reverse water distribution cooling tower to improve the basic heat exchange efficiency of large-and-medium-sized natural draft cooling tower, improve the work efficiency of cooling tower under the variable working condition, improve the frostproofing ability of cooling tower when winter low temperature simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
the utility model provides an arc distribution pipe reverse water distribution cooling tower, includes the cooling tower body and sets up in the central shaft that the cooling tower body intermediate position is vertical extension and arranges, central shaft upper portion is equipped with along its circumference interval arrangement, and along the radial outside water delivery groove that extends of cooling tower body, the overhang of water delivery groove is equipped with a main basin, main basin is followed the radial inside extension of cooling tower body arranges and its one end that is close to central shaft seals, be equipped with on the main basin along its length direction interval arrangement and along the arc distribution pipe of the circumference extension of cooling tower body, the overhang of arc distribution pipe seals and is equipped with the splash device of a plurality of interval arrangements on its body.
In a further technical scheme, the arc-shaped water distribution pipe is an arc-shaped water distribution pipe.
In a further technical scheme, the suspension end of the water conveying tank is close to and spaced from the inner wall of the cooling tower body.
In a further technical scheme, the arc water distribution pipes are arranged at equal intervals along the length direction of the main water tank.
In a further technical scheme, at least three water conveying grooves are uniformly arranged along the circumferential direction of the central vertical shaft at intervals. In particular, for example, the water supply troughs may be arranged at regular intervals of three, four or five in the circumferential direction of the central shaft.
In a further technical scheme, the arc-shaped water distribution pipes are arranged on one side or two sides of the main water tank, and the arc-shaped water distribution pipes on the adjacent main water tanks cover a water distribution area between the two water distribution pipes.
In a further technical scheme, the arc-shaped water distribution pipes are arranged on two sides of the main water tank, and the arc-shaped water distribution pipes arranged on the adjacent main water tanks equally divide the area to be distributed between the two water distribution pipes.
In a further technical scheme, four water conveying tanks are arranged at intervals along the circumferential direction of the central vertical shaft, arc-shaped water distribution pipes positioned on two sides of the four main water tanks corresponding to the four water conveying tanks are arranged on the four main water tanks, and the arc-shaped water distribution pipes arranged on the adjacent main water tanks equally divide a water area to be distributed between the two main water tanks; and the arc-shaped water distribution pipe is provided with a splashing device.
In a further technical scheme, at least one shutter is further arranged on the main water tank and used for controlling the on-off of water flow of the main water tank and controlling the flow of cooling water flowing to the inner area of the cooling tower. Through the setting of this flashboard, regional area size and the interior outer district water distribution intensity that needs the water distribution that can be convenient control.
The utility model discloses in, through set up the flashboard on main basin to control the size and the interior outer district water distribution intensity of treating the regional area of water distribution through this flashboard. Specifically, for example, a plurality of gate positions are arranged on the main water tank, when the gate plate falls down at one gate position, water cannot be introduced into the main water tank on one side of the gate plate close to the central shaft, so that the part of the main water tank and the arc-shaped water distribution pipe communicated with the part of the main water tank do not contain water, and only the main water tank on one side of the gate plate close to the inner wall of the cooling tower contains water, namely water can be introduced into the arc-shaped water distribution pipe corresponding to the part of the main water tank to realize water distribution in the outer area. The opening degree of the gate can be adjusted, the flow of cooling water flowing to the inner area of the cooling tower is controlled, and the water distribution strength of the inner area and the outer area is controlled.
In a further technical scheme, the flashboard is provided with one and is located at the middle position of the length direction of the main water tank.
Compared with the prior art, the utility model discloses following technological effect has:
1. based on the arc water distribution pipe reverse water distribution cooling tower provided by the utility model, the gas-water ratio consistency of the whole tower is effectively improved, water is guided to a position close to the inner wall of the cooling tower body through the water conveying grooves which are arranged on the circumference of the central vertical shaft at intervals, namely, the water is guided to the position with the maximum air volume to start water distribution, so that the water volume in the place with large air volume is also large; particularly, under the condition of variable working conditions, the water quantity given to the place with large air quantity is large, the water quantity given to the place with small air quantity is small, and the basic efficiency of the cooling tower is effectively improved;
2. in the utility model, the variable working condition performance of the cooling tower is greatly improved, and when the cooling water reduces the water quantity, the cooling water quantity is gradually reduced from the inside with small air quantity from inside to outside;
the position of the main water tank close to the central shaft is the tail end of water distribution, and when the working condition is changed, water shortage or little water firstly appears in an inner area close to the central shaft, namely an area with a small air amount, so that the principle of water distribution with large water supply amount at a place with a large air amount and small water supply amount at a place with a small air amount is met.
3. The utility model discloses in, under any operating mode, the cooling tower periphery is the maximum flow region all the time, has improved the rigidity in cooling tower periphery water spray district, has reduced the adverse effect of environment wind to the cooling tower performance.
4. The utility model discloses in, under any operating mode, the outer district of water distribution of cooling tower all is in the maximum flow district, has improved the freezing resistance performance of cooling tower in winter greatly.
5. The utility model discloses in, the setting of flashboard can make the cooling tower when winter, and the outer district hot water of cooling tower is more concentrated, is favorable to the cooling tower to prevent frostbite and freeze more.
Other features and advantages of the present invention will be described in detail in the following detailed description.
Drawings
Fig. 1 shows a schematic structural diagram of a cooling tower with reversely distributed water through an arc-shaped water distribution pipe, which is provided by the embodiment 1 of the invention;
fig. 2 is a schematic structural diagram of a cooling tower with reverse water distribution by arc water distribution pipes, which is provided in embodiment 2 of the present invention;
fig. 3 is a schematic vertical sectional view of a cooling tower with reverse water distribution by an arc water distribution pipe in embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram illustrating a reverse water distribution cooling tower with an arc-shaped water distribution pipe, which is provided in embodiment 3 of the present invention;
fig. 5 is a schematic structural diagram of a cooling tower with reverse water distribution by arc water distribution pipes, which is provided in embodiment 4 of the present invention;
the reference numbers in the figures illustrate: 10. cooling the tower body; 20. a central shaft; 21. a water delivery tank; 30. a main water tank; 31. a shutter plate; 40. an arc-shaped water distribution pipe; 50. a splashing device; 60. a filler zone.
Detailed Description
In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further clarified by combining the specific drawings.
It should be noted that, in the present invention, when an element is referred to as being "fixed" to another element, it may be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1 and 3, the present embodiment provides an arc-shaped water distribution pipe reverse water distribution cooling tower, including a cooling tower body 10 and a central shaft 20 disposed in the middle of the cooling tower body 10 and extending vertically, wherein the upper portion of the central shaft 20 is provided with water delivery tanks 21 disposed circumferentially at intervals and extending radially outward of the cooling tower body 10, a main water tank 30 is disposed at an overhang end of the water delivery tanks 21, the main water tank 30 extends radially inward of the cooling tower body 10, and one end of the main water tank close to the central shaft 20 is closed;
the water delivery tank 21 and the main water tank 30 have the same size, and the upper wall of the water delivery tank 21 is the lower wall of the main water tank 30;
the main water tank 30 is provided with arc-shaped water distribution pipes 40 which are arranged at intervals along the length direction of the main water tank and extend along the circumferential direction of the cooling tower body 10, the suspension ends of the arc-shaped water distribution pipes 40 are closed, and the pipe body of the arc-shaped water distribution pipes is provided with a plurality of splashing devices 50 which are arranged at intervals. A packing area 60 is provided below the sputtering apparatus 50. The suspension end of the water delivery tank 21 is close to and spaced from the inner wall of the cooling tower body 10; the water distribution pipes 40 are arranged at intervals along the length direction of the main water tank 30. Four water conveying tanks 21 are arranged at intervals along the circumferential direction of the central shaft 20, arc-shaped water distribution pipes 40 positioned on two sides of the four main water tanks 30 corresponding to the four water conveying tanks 21 are arranged on the four main water tanks 30, and the arc-shaped water distribution pipes 40 arranged on the adjacent main water tanks 30 are equally divided into areas to be distributed between the two water distribution pipes; the arc-shaped water distribution pipe 40 is provided with a splashing device 50.
The main water tank 30 is further provided with a flashboard 31, the flashboard 31 is arranged in the middle of the main water tank 30 in the length direction, the main water tank 30 can be divided into two sections through the design of the flashboard 31, the inner section is anhydrous in winter, and the outer section is hydrated, so that even when the minimum water quantity of the cooling tower in winter is reached, the outer section of water distribution of the cooling tower is also sufficiently hot for running and freezing prevention.
In this embodiment, as shown in fig. 1, the cross-section of the cooling tower body 10 is that four main water tanks 30 are divided into four equal parts, and then arc-shaped water distribution pipes 40 are arranged on both sides of each main water tank 30, and the arc-shaped water distribution pipes 40 extending oppositely on the adjacent main water tanks 30 cover the area to be distributed between the two.
In a specific operation, the water is guided to a higher position through the central shaft 20, then guided to a position close to the inner wall of the cooling tower 10 through the water delivery tank 21, guided inward through the main water tank 30 provided at the suspended end of the water delivery tank 21 and extending radially inward of the cooling tower 10, dispersed through the arc-shaped water distribution pipes 40 distributed on the main water tank 30, and sprayed through the spraying devices 50 provided on the arc-shaped water distribution pipes 40.
In the embodiment, the cooling tower is divided into four water distribution sectors, water distribution is carried out by matching with the 45-degree arc-shaped water distribution pipe 40, and the water distribution operation is continuously and gradually changed, so that engineering realization, numerical simulation and water distribution calculation are facilitated.
Based on the arc-shaped water distribution pipe reverse water distribution cooling tower provided by the embodiment, statistical data show that the temperature of circulating water discharged from the cooling tower is reduced by 1 ℃, and under the condition that other conditions are not changed, the coal consumption is averagely reduced by 1-1.2 g/(kilowatt-hour) under the same power generation capacity. Taking a 600MW unit as an example: the temperature of the water discharged from the cooling tower is reduced by 1 ℃, and about 250 ten thousand yuan of coal consumption is saved all the year round. The coal cost is saved by 7500 ten thousand yuan in total by 30 years of the total service life. The coal consumption is reduced by about 3500 tons every year, and the energy-saving and carbon-reducing effects are obvious.
Example 2
This embodiment is substantially the same as the cooling tower with reverse water distribution by the arc-shaped water distribution pipe of embodiment 1, except that, as shown in fig. 2, the arc-shaped water distribution pipe 40 is provided only on one side of the main water tank 30.
Example 3
This embodiment is substantially the same as the arc-shaped water distribution pipe counter-distributed water cooling tower of embodiment 1, except that, as shown in fig. 4, three water supply tanks 21 are arranged at intervals along the circumference of the central shaft 20.
That is, the area to be distributed of the cooling tower 10 is equally divided into three by the three main water tanks 30.
The main water tank 30 is provided with arc-shaped water distribution pipes 40 positioned at two sides of the main water tank, and the arc-shaped water distribution pipes 40 arranged on the adjacent main water tanks 30 are equally divided into areas to be distributed between the two water distribution pipes; the arc-shaped water distribution pipe 40 is provided with a splashing device (not shown in the figure).
Example 4
This embodiment is substantially the same as the arc-shaped water distribution pipe counter-distributed water cooling tower of embodiment 1, except that, as shown in fig. 5, five water supply tanks 21 are arranged at intervals along the circumference of the central shaft 20.
That is, the area to be distributed of the cooling tower 10 is equally divided into five by the five main water tanks 30.
The main water tank 30 is provided with arc-shaped water distribution pipes 40 positioned at two sides of the main water tank, and the arc-shaped water distribution pipes 40 arranged on the adjacent main water tanks 30 are equally divided into areas to be distributed between the two water distribution pipes; the arc-shaped water distribution pipe 40 is provided with a splashing device (not shown in the figure).
The foregoing shows and describes the general principles, essential features, and features of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the description of the above embodiments and the description is only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and these changes and modifications are all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an arc water distribution pipe reverse water distribution cooling tower, includes cooling tower body (10) and sets up in central shaft (20) that is vertical extension in cooling tower body (10) intermediate position and arranges, its characterized in that, central shaft (20) upper portion is equipped with along its circumference interval arrangement, and along radial outside water delivery groove (21) of extending of cooling tower body (10), the overhang of water delivery groove (21) is equipped with a main basin (30), main basin (30) are followed the radial inside extension of cooling tower body (10) is arranged and its one end that is close to central shaft (20) is sealed, be equipped with on main basin (30) along its length direction interval arrangement and along arc water distribution pipe (40) of the circumference extension of cooling tower body (10), the overhang of arc water distribution pipe (40) seals and is equipped with the device (50) of a plurality of interval arrangements on its body.
2. The tower of claim 1, wherein the arc-shaped water distribution pipe (40) is a circular arc-shaped water distribution pipe.
3. The tower of claim 1, wherein the water delivery tank (21) has a hanging end spaced adjacent to the inner wall of the cooling tower (10).
4. The tower of claim 1, wherein the arc distribution pipes (40) are arranged at equal intervals along the length of the main water tank (30).
5. The tower as claimed in claim 1, wherein the water delivery channels (21) are arranged in at least three evenly spaced circumferential directions along the central shaft (20).
6. The tower of claim 1, wherein the arc water distribution pipes (40) are disposed on one or both sides of the main water tank (30), and the arc water distribution pipes (40) of the adjacent main water tanks (30) cover the water distribution area therebetween.
7. The tower of claim 1, wherein the arc water distribution pipes (40) are disposed at two sides of the main water tank (30), and the arc water distribution pipes (40) disposed on the adjacent main water tanks (30) equally divide the water distribution area therebetween.
8. The tower of claim 1, wherein four water delivery tanks (21) are arranged at intervals along the circumference of the central shaft (20), and arc-shaped water distribution pipes (40) are disposed on the four main water tanks (30) corresponding to the four water delivery tanks (21) at both sides thereof,
an arc-shaped water distribution pipe (40) arranged on the adjacent main water tank (30) equally divides a water area to be distributed between the two water distribution pipes;
the arc-shaped water distribution pipe (40) is provided with a splashing device (50).
9. The tower of claim 1, wherein the main water tank (30) is further provided with at least one shutter (31) for controlling the flow of water from the main water tank (30) and the flow of cooling water to the inner region of the tower.
10. The tower of claim 9, wherein the shutter (31) is provided with one and located at the middle position of the main water trough (30) in the length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221206514.9U CN218410792U (en) | 2022-05-18 | 2022-05-18 | Arc water distribution pipe reverse water distribution cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221206514.9U CN218410792U (en) | 2022-05-18 | 2022-05-18 | Arc water distribution pipe reverse water distribution cooling tower |
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| Publication Number | Publication Date |
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| CN218410792U true CN218410792U (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221206514.9U Active CN218410792U (en) | 2022-05-18 | 2022-05-18 | Arc water distribution pipe reverse water distribution cooling tower |
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| CN (1) | CN218410792U (en) |
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2022
- 2022-05-18 CN CN202221206514.9U patent/CN218410792U/en active Active
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