CN205403528U - Natural draft dry -type air cooling tower safety device against wind - Google Patents

Abstract

The utility model provides a natural draft dry -type air cooling tower safety device against wind, the lower extreme circumference of air cooling tower is equipped with the air cooling radiator, wherein, natural draft dry -type air cooling tower safety device against wind includes: the wing wall, its vertical locating the outside of air cooling radiator, the radial symmetry of air cooling tower is provided with two the wing wall, the width of wing wall is more than or equal to the height of wing wall, the wing runs through on the wall and is equipped with a plurality of trompils. The utility model discloses setting up roomy wing wall in the outside of air cooling tower, and slightly punishing the perpendicular environment beam wind of wing wall, it can effectively change the outer pressure distribution of radiator, weakens the environment beam wind to the adverse effect of air cooling tower, improves the economic benefits in power plant.

Description

Natural ventilation dry air cooling tower windproof device

technical field

The utility model relates to a cooling system in the technical field of power plants, in particular to a windproof device for an indirect air-cooling tower, in particular to a windproof device for a naturally ventilated dry-type air-cooling tower.

Background technique

Indirect air cooling is a new cooling technology for power plants. It uses air as a cold source to indirectly discharge waste heat in the steam cycle of power plants. This type of cooling system consists of a condenser, a circulating water pump and its pipelines, a natural ventilation dry The air-cooling tower consists of three parts. The exhaust steam of the steam turbine is cooled by circulating water. The heated circulating water then passes through the air-cooling tower to discharge heat into the air, and so on. This cooling method not only has many advantages such as water saving, low noise, easy maintenance, low operating cost, and low impact on the environment, but more importantly, it provides a solution for some water-scarce areas to build power plants, so it is being used worldwide be more and more widely used.

The radiator of the natural ventilation dry air cooling tower usually has two forms, one is arranged vertically outside the tower, and the other is arranged horizontally inside the tower. Since air is used as the cooling medium, no matter what kind of arrangement it is, its performance is affected by the ambient meteorological conditions. The heat dissipation power of the air cooling tower comes from the difference between the hot water temperature of the circulating water and the ambient temperature (Initial temperature difference, ITD), when the ambient temperature When it rises, in order to dissipate the same heat, the ITD value should basically be kept at the same level, so basically the temperature of hot water will rise linearly with the ambient temperature, so that the pressure of the condenser will increase and reach The upper limit of the design back pressure range of the unit.

Among them, one of the main factors affecting the performance of the air-cooling tower is the lateral wind speed of the environment. The lateral wind forms a circumvention outside the tower, which reduces the air inlet pressure of the side of the air-cooling tower relative to the wind direction and the radiator on the back, and reduces the cooling air volume of the air-cooling tower. , which seriously deteriorates the heat dissipation performance of the air-cooling tower, causing the back pressure of the unit to increase and the power generation efficiency to decrease. When the hot water temperature reaches the upper limit, the load of the unit will be limited. The existing technology is to install multiple narrow fin walls in the circumferential direction of the air cooling tower, and the width of the fin walls is smaller than the height of the fin walls, or to install a cross-shaped windshield wall in the tower, but the windproof effect is not ideal.

In view of the problems existing in the above-mentioned prior art, the inventor combines years of design and use experience in related manufacturing fields, supplemented by strong professional knowledge, optimizes the existing structure, and provides a natural ventilation dry air cooling tower Windproof device, to overcome above-mentioned defective.

Utility model content

The purpose of this utility model is to provide a natural ventilation dry-type air-cooling tower windproof device, which is provided with a wide wing wall on the outside of the air-cooling tower, and the wide wing wall is vertical to the horizontal wind of the environment, which can effectively change the pressure distribution outside the radiator, weaken the The adverse effect of ambient cross wind on the air cooling tower improves the economic benefits of the power plant.

Above-mentioned purpose of the utility model can adopt following technical scheme to realize:

The utility model provides a windproof device for a dry air-cooling tower with natural ventilation. An air-cooled radiator is arranged around the lower end of the air-cooling tower, wherein the windproof device for a dry-type air-cooling tower with natural ventilation includes: The outer side of the air-cooled radiator, the radial symmetry of the air-cooling tower is provided with two of the fin walls, the width of the fin walls is greater than or equal to the height of the fin walls, and a plurality of hole.

In a preferred embodiment, the height of the fin wall is equal to the height of the air-cooled radiator.

In a preferred embodiment, a plurality of support legs are provided under the fin wall, a support platform is provided below the air-cooled radiator, and the height of the support legs is equal to the height of the support platform.

In a preferred embodiment, the height of the supporting legs is 2 meters.

In a preferred embodiment, the openings are round holes, and a plurality of openings are evenly distributed on the wing wall.

In a preferred embodiment, the porosity of the openings is 0.3-0.5.

In a preferred embodiment, the fin walls are arranged perpendicular to the incoming wind direction of the summer lateral wind.

In a preferred embodiment, there is a distance between the fin wall and the air-cooling radiator.

The windproof device for the natural ventilation dry air cooling tower of the utility model is symmetrically provided with wing walls on both sides of the air cooling tower. The wing walls are provided with a plurality of openings, and the wing walls are perpendicular to the incoming wind direction of the local summer transverse wind, which can effectively relieve air cooling. The problem of air circumvention on the sides and back of the tower relative to the wind direction improves the pressure distribution outside the air-cooling tower to increase the air intake of the air-cooling radiator and improve the heat dissipation performance of the air-cooling tower in windy weather, thereby reducing the back pressure of the generator set , improve the economical efficiency of the generating set, improve the load limitation in summer windy weather, and increase the economic income of the power plant; the utility model has simple structure and low engineering construction cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the air-cooling tower of the utility model natural ventilation dry-type air-cooling tower windproof device;

Fig. 2 is the top view structure schematic diagram of the utility model natural ventilation dry type air cooling tower windproof device;

Fig. 3 is a partial structural schematic diagram of a windproof device for a natural ventilation dry-type air cooling tower of the present invention.

Explanation of reference numbers:

1 tower, 2 pillars, 3 ground, 4 air-cooled radiator, 5 supporting platform, 6 supporting legs, 7 wing wall, 8 opening, 9 air-cooling tower, H1 height, H2 height, W1 width, F wind direction.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Fig. 1 and Fig. 2, the utility model provides a kind of windproof device of natural ventilation dry type air cooling tower, the lower end of described air cooling tower 9 is provided with air cooling radiator 4 circumferentially, wherein, the windproof device of described natural ventilation dry type air cooling tower Including: a fin wall 7, which is vertically arranged on the outside of the air-cooling radiator 4, two fin walls 7 are arranged radially symmetrically on the air-cooling tower 9, and the width W1 of the fin wall 7 is greater than or equal to The height H2 of the wing wall 7 is that a plurality of openings 8 are formed through the wing wall 7 .

Specifically, as shown in Figures 1 to 3, the wing wall 7 is a wide wing wall, that is, the width W1 of the wing wall 7 is greater than or equal to the height H2 of the wing wall 7, preferably, the width W1 of the wing wall 7 is equal to the width W1 of the wing wall The height H2 of 7 is to prevent the horizontal wind from blowing away from the side of the air cooling tower 9 through the narrow wing wall. The two wing walls 7 symmetrically arranged on both sides of the air cooling tower 9 are arranged vertically to the ground 3 and extend upwards. To the same height as the air-cooled radiator 4, that is, the height H2 of the fin wall 7 is equal to the height H1 of the air-cooled radiator 4, so that more wind can enter through the plurality of openings 8 of the fin wall 7 The air-cooled radiator 4 improves the heat dissipation performance of the air-cooled radiator 4; wherein, the fin wall 7 is a material with sufficient strength and light weight, so as to resist strong incoming wind and reduce the load of the supporting legs 6, saving cost.

Further, as shown in Figures 1 and 2, the air-cooling tower 9 includes a tower tube 1 and a pillar 2 arranged at the lower end of the tower barrel 1, wherein the pillar 2 is arranged on the ground 3 and arranged circularly along the circumference of the tower barrel 1, Preferably, the pillar 2 is an X-shaped pillar to make its structure more stable. Of course, the pillar 2 can also be made into other structures, which are not limited here; the air-cooling radiator 4 ring is arranged on the pillar 2 of the air-cooling tower 9, and A support platform 5 is provided below the air-cooled radiator 4 to support and fix the air-cooled radiator 4. A plurality of support legs 6 are provided below the wing wall 7 to support the wing wall 7. The support legs 6 The height is equal to the height of the support platform 5, preferably, the height of the support legs 6 is 2 meters, so that the passage of vehicles and pedestrians can be facilitated under the support legs 6.

Further, as shown in FIG. 3 , the openings 8 are round holes, and a plurality of openings 8 are evenly distributed on the wing wall 7. Of course, the openings 8 can also be in other shapes, which are not limited here. The size and porosity of the openings 8 can be optimally designed according to specific projects. Preferably, the porosity of the openings 8 is 0.3 to 0.5, which means that most of the transverse wind can pass through multiple openings 8 to solve the problem of air cooling. The pressure distribution on the back side (i.e. downstream) and the downstream side of the tower 9 relative to the wind direction F can improve the air intake of the air cooling tower 9, and can also make part of the transverse wind blocked by the wing wall 7 and directly enter the upstream side of the air cooling tower 9 , and can ensure the wind resistance strength of the fin wall 7 , wherein the porosity is the ratio of the total volume of the plurality of openings 8 of the fin wall 7 to the total volume of the fin wall 7 .

Further, the fin wall 7 is arranged on the outside of the air-cooling radiator 4, and there is a distance between the fin wall 7 and the air-cooling radiator 4, so as to set the cleaning mechanism of the air-cooling radiator 4, or to leave a certain space For the convenience of maintenance, of course, there may be no space between the fin wall 7 and the air-cooling radiator 4, that is, the two are arranged adjacent to each other.

Preferably, the best installation position of the fin wall 7 can be determined according to the local meteorological statistical results, because a decisive factor affecting the performance of the air cooling tower 9 is the ambient temperature, so the statistical results of the wind direction during the high temperature period in summer should be used as the main basis. That is, the wing wall 7 is arranged vertically to the incoming wind direction F of the summer transverse wind. After the main incoming wind direction F in the summer high temperature period is determined, the wing wall 7 should be arranged at a position perpendicular to the incoming wind direction F, such as As shown in Fig. 2, the summer lateral wind energy is vertically passed through the opening 8 on the fin wall 7, and enters the two sides and the back (i.e. downstream) of the air cooling tower 9 relative to the incoming wind direction F, avoiding the sides and the back of the air cooling tower 9. The pressure outside the air-cooled radiator 4 is reduced due to air circumvention on the back side, which affects the ability of air intake. In one embodiment, an auxiliary fin wall with the same structure as the fin wall 7 can also be arranged upstream or downstream of the fin wall 7 relative to the incoming wind direction F, that is, the auxiliary fin wall is also perpendicular to the incoming wind direction of the summer lateral wind, And the width of the auxiliary fin wall is greater than its height, so as to better improve the pressure distribution on the side and back of the air cooling tower 9 relative to the wind direction F. Of course, the auxiliary fin wall may not be provided, and there is no limitation here.

When there is an ambient cross wind, especially when the ambient cross wind speed is high (for example above 4 m/s), the air circumvention outside the air cooling tower 9 causes the pressure outside the air cooling radiator 4 to decrease, reducing the air intake capacity, The air-cooled radiators 4 with deteriorated performance are mainly concentrated on the side and downstream of the air-cooling tower 9, while the windproof device of the utility model natural ventilation dry-type air-cooling tower is in operation, compared with the prior art without fin walls and with multiple narrow fins in the circumferential direction. As far as the fin wall is concerned, the wide fin wall 7 can more effectively change the pressure distribution outside the air-cooling radiator 4 , increase the air intake, and improve the performance of the air-cooling radiator 4 .

The indirect air-cooling tower equipped with a certain 660MW unit is taken as an example below to illustrate: under the design ITD (30°C), when the wind speed is 8 meters/second (m/s), according to the method of the present invention, the air-cooling tower 9 is installed on the outside of the air-cooling tower 9. Two fin walls 7 are arranged radially and symmetrically, and the fin walls 7 are perpendicular to the wind direction F of the summer transverse wind, which can increase the heat dissipation by more than 10% compared with before installing the fin walls 7, and can reduce the heat dissipation under the same heat dissipation. The temperature of the circulating water is 2°C to 3°C. When the wind speed is higher, the effect will be better; with the advancement of power plant technology, the boiler efficiency and steam turbine efficiency have reached a relatively high level, and there is little room for further improvement. And the solution of the windproof problem of the air cooling tower 9 effectively weakens the adverse influence of the ambient transverse wind on the air cooling tower 9 and improves the benefit of the power plant.

The windproof device of the natural ventilation dry air cooling tower of the utility model is symmetrically provided with wing walls 7 on both sides of the air cooling tower 9, and the wing walls 7 are provided with a plurality of openings 8, and the wing walls 7 are perpendicular to the incoming wind direction of the local summer transverse wind F, can effectively alleviate the air flow problem on both sides and back of the air-cooling tower 9 relative to the wind direction F, improve the pressure distribution outside the air-cooling tower 9, to increase the air intake of the air-cooling radiator 4, and improve the air-cooling tower 9 in windy weather Lower heat dissipation performance, thereby reducing the back pressure of the generating set, improving the economical efficiency of the generating set, improving the load limitation of the summer windy weather, and increasing the economic benefits of the power plant; the utility model has a simple structure and low construction costs.

The above descriptions are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not used to limit the utility model. Those who have ordinary knowledge in the technical field, without departing from the scope of the technical solution of the present utility model, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all without departing from the technical solutions of the present utility model For the content of the technical solution, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still belong to the scope of the technical solution of the present utility model.

Claims (8)

1. A natural ventilation dry type air cooling tower windproof device, the lower end of the air cooling tower is circumferentially provided with an air cooling radiator, it is characterized in that the natural ventilation dry type air cooling tower windproof device comprises: Finned walls, which are vertically arranged on the outside of the air-cooled radiator, two finned walls are arranged radially symmetrically on the air-cooled tower, and the width of the finned walls is greater than or equal to the height of the finned walls, so A plurality of openings are formed on the wing wall. 2 . The windproof device for natural ventilation dry air cooling tower according to claim 1 , wherein the height of the fin wall is equal to the height of the air cooling radiator. 3 . 3. The natural ventilation dry-type air cooling tower windproof device according to claim 1, wherein a plurality of support legs are provided below the wing wall, a support platform is provided below the air-cooled radiator, and the support The height of the legs is equal to the height of the support platform. 4. The windproof device for natural ventilation dry-type air cooling tower according to claim 3, characterized in that, the height of the supporting legs is 2 meters. 5 . The windproof device for a dry air cooling tower with natural ventilation according to claim 1 , wherein the opening is a round hole, and a plurality of openings are evenly distributed on the wing wall. 5 . 6 . The windproof device for a dry air cooling tower with natural ventilation according to claim 5 , wherein the porosity of the openings is 0.3-0.5. 7. The windproof device for natural ventilation dry-type air cooling tower according to claim 1, characterized in that, the wing wall is arranged perpendicular to the incoming wind direction of the summer transverse wind. 8. The windproof device for a dry air-cooling tower with natural ventilation according to claim 1, wherein there is a distance between the fin wall and the air-cooling radiator.