CN205448747U - Cooling column heat transfer device of thermal power plant - Google Patents

Abstract

The utility model discloses a cooling column heat transfer device of thermal power plant belongs to the cooling tower field of making. Including the tower body, the bottom both sides of tower body are provided with the air intake respectively, and it is air inlet district, rain zone, filler district and distribution system to make progress in proper order from the bottom, inhomogeneous the setting in distribution system below of nozzle. A method of three -dimensional optimization based on foretell heat transfer device is arranged, (1 )Gather the original design parameters of cooling column, including tower body design parameters and meteorological parameter, (2 )Gather cooling column actual motion situation parameter, (3 )Adopt fulent software platform, (4) the calculation of building pattern of heat exchange power field is carried out to the cooling tower to the parameter of input step (1) and step (2), according to the numerical result, confirms that the cooling column intakes different zone nozzle bore and filler and arrange the height. Thereby carry out cooling column heat transfer device's three -dimensional optimization and arrange that the geomantic omen is matchd properly, has improved cooling column heat exchange efficiency greatly.

Description

A thermal power plant cooling tower heat exchange device

technical field

The utility model relates to the field of cooling tower manufacturing, in particular to a heat exchange device for a cooling tower of a thermal power plant.

Background technique

The cold end system of a thermal power plant includes a condenser, a vacuum pump, a cooling tower, a circulating water pump and its water supply pipeline. Its function is to provide circulating cooling water with the required temperature and flow rate to the condenser to cool the exhaust steam that has done work in the main system, and absorb the latent heat of vaporization of the exhaust steam to turn it into condensed water, thereby completing the cycle; on the other hand , It also provides guarantee for the formation and maintenance of condenser vacuum. Among them, the working performance of the cooling tower determines the temperature of the circulating water entering the condenser, which has a crucial impact on the safe and economical operation of the unit and the entire power plant.

With the increasingly severe global energy situation, energy conservation has become a major theme of energy policies in various countries. The National Development and Reform Commission clearly stated in the "Medium and Long-term Special Plan for Energy Conservation" that the macro energy conservation goal is to achieve an average annual energy conservation rate of 3% from 2003 to 2020, and the resulting energy conservation capacity will be 1.4 billion tons of standard coal. The National Energy Administration and the Ministry of Finance have issued a notice on the comprehensive upgrading and performance optimization of coal-fired power plants. During the "Twelfth Five-Year Plan" period, mature, reliable, economical and applicable advanced power generation technologies will be adopted to comprehensively upgrade and optimize the performance of coal-fired power plants in service. For thermal power plants that have been put into operation, on the basis of ensuring the safe and stable operation of the units, how to save energy, reduce emissions, and improve the operating economy of the units is the most important task for thermal power plants. The current energy-saving technical transformation work mainly focuses on the performance optimization of the machine and furnace body and the optimization of the frequency conversion performance of the turning machine. Few consider issues from the perspective of the cold-end system, in response to the national call for energy conservation and emission reduction, to reduce the production cost of enterprises and improve the competitiveness of enterprises.

At present, the model of "single-zone, one-dimensional, uniform wind" is adopted in the design of natural ventilation counterflow wet cooling towers in thermal power plants. This model has a certain deviation from the actual conditions, so that the cooling tower works in the design state (that is, when the cooling capacity reaches 100%) , theoretically there is still room for a temperature drop of nearly 4°C. This technology uses the three-dimensional optimization layout system of the cooling tower heat exchange device to simulate the three-dimensional modeling and simulation calculation of the dynamic field in the cooling area. According to the calculation results, the filling of the cooling tower is rearranged to enhance the heat transfer performance. The original design heat transfer capacity (100%) On top of that, the heat transfer efficiency of the cooling tower is increased by no less than 20%, and the temperature of the tower water is further reduced to 1.5-3°C.

Chinese patent application, application number 201210319829.9, published on January 9, 2013, discloses a three-dimensional simulation calculation method for the process design of a super-large counterflow natural ventilation cooling tower. The present invention discloses a three-dimensional simulation of the process design of a super-large counterflow natural ventilation cooling tower The calculation method includes: establishing a three-dimensional grid model of the super-large cooling tower according to the process size of the super-large cooling tower; calculating ambient air parameters and cooling water parameters of the super-large cooling tower, and importing the parameters into a preset environment Meteorological program; read in the three-dimensional grid model in the computational fluid dynamics software, compile the environmental meteorological program; designate the calculation area of the water temperature scalar as the heat and mass transfer area, and set the control parameters; initialize the calculation domain , to calculate the simulation results. The CFD technology used in the present invention has a high degree of visualization and strong scalability, and the proposed three-dimensional simulation calculation method can obtain the air flow field inside and outside the super-large counterflow natural ventilation cooling tower and the thermal performance of the cooling tower under the influence of environmental meteorological conditions parameters to assess the impact of power plant architecture on the thermal performance of very large natural draft cooling towers. However, this plan does not adjust the water spraying volume of the cooling tower heat exchange devices in different areas, does not make uneven targeted settings, and does not set the filler in different areas according to the actual situation of the power field. Highly furnished.

Contents of the invention

1. Technical problems to be solved

Aiming at the one-dimensional design and uniform air intake arrangement in the existing thermal power plant cooling tower heat exchange technology, the cooling effect is poor and the efficiency is low. The utility model provides a heat exchange device for a cooling water tower of a thermal power plant. It adopts three-dimensional optimized layout, proper Feng Shui matching, good cooling effect and high efficiency.

2. Technical solution

The purpose of this utility model is achieved through the following technical solutions.

A cooling water tower heat exchange device in a thermal power plant, comprising a tower body, air inlets are respectively arranged on both sides of the bottom of the tower body, and from the bottom upwards are an air inlet area, a rain area, a filling area and a water distribution system, and the bottom of the water distribution system is A number of nozzles with downward spouts are arranged, and the nozzles are unevenly arranged under the water distribution system, and a packing layer with good heat exchange effect is arranged under the water distribution system.

Furthermore, the water distribution system includes a sump, a water inlet pipe and a water distribution pipe. The water distribution pipes are unevenly arranged, and the water distribution pipes are densely arranged in the part with a large power field, and the ends of the water distribution pipes are connected to the nozzles at the bottom.

Further, the nozzles have a uniform diameter, and the water distribution pipes are densely arranged in the part with a large power field, and the water distribution pipes are arranged sparsely in a part with a small power field.

Furthermore, the diameter of the nozzle is 20-36mm.

Furthermore, the packing area includes a packing support and a packing, and the packing is arranged on the packing support, and the packing height is unevenly arranged, and the packing height is high at a position with a large dynamic field, and the packing height is low at a position with a small dynamic field.

Furthermore, the height of the packing is 0.5m-2.0m.

A three-dimensional optimal layout method based on the above-mentioned cooling tower heat exchange device of a thermal power plant, the steps are as follows:

(1) Collect the original design parameters of the cooling tower, including tower body design parameters and meteorological parameters;

(2) Collect the actual operating status parameters of the cooling tower;

(3) Using the Fulent software platform, using CFD, that is, the method of computational fluid dynamics, input the parameters of step (1) and step (2) to model the cooling tower, the modeling takes the center of the cooling tower bottom as the origin, and the radius The space with a height of 500m and a height of 900m is the calculation domain. After gridding, 10-15 million calculation points are generated, and the velocity field, temperature field, pressure field, humidity field and dynamic field of the humid air and circulating water in the tower are obtained through calculation;

(4) Based on the calculation results, calculate the water distribution and packing arrangement scheme corresponding to the optimal value of the circulating water outlet water temperature state, and determine the nozzle diameter and packing arrangement height in different areas of the cooling water tower inlet.

Furthermore, the design parameters of the tower body in the step (1) are tower type, water spraying area, total tower height, air inlet height, throat diameter, top diameter, design water volume entering the tower, design circulating water inlet/outlet Water temperature, annual average tower intake, annual average tower output, cooling tower design temperature drop, and meteorological parameters are: local atmospheric pressure, air dry bulb temperature, and air relative humidity.

Furthermore, the parameters of the actual operating condition of the cooling tower in step (2) include circulating water volume, inlet water temperature, outlet water temperature, and air temperature.

Furthermore, the area corresponding to the large dynamic field of the humid air and circulating water has a large nozzle diameter and a high height of the packing arrangement, and the area where the dynamic field of the humid air and circulating water is small has a small nozzle diameter and a low packing arrangement height.

3. Beneficial effect

Compared with the prior art, the utility model has the advantages of:

(1) The cooling tower adopts a targeted layout method, and optimizes the configuration of nozzles and fillers according to the distribution of the aerodynamic field in the tower. The configuration is well targeted, low in cost, and has a good cooling effect;

(2) The cooling tower adopts a targeted layout method, and adjusts the size of the nozzle through different power field settings, which optimizes the configuration of the nozzle and reduces the cost of nozzle setting;

(3) The cooling tower is effectively distributed for the water distribution pipes under different dynamic fields, with good visibility, and the configuration corresponds to the density of the nozzles, and the efficiency is high;

(4) In this design scheme, direct transformation is carried out based on the original cooling water tower, and targeted transformation is aimed at the low efficiency of the original tower, with fewer transformation parts, low cost and high speed;

(5) Make full use of the different cooling efficiencies of the cooling tower in the three areas, namely, the rain area, the filling area and the water distribution area, and focus on the transformation of the filling area. The transformation cost is low and the effect is good;

(6) Through the three-dimensional optimized arrangement of the heat exchange device of the cooling water tower, the wind and water exchange in the heat exchange device are more matched, and the heat exchange capacity of the original air entering the tower is fully utilized, the optimization effect is good, and the efficacy of the original tower is not affected ;

(7) The increase in heat absorption of the air out of the tower reduces the density of the air out of the tower, thereby increasing the density difference between the inside and outside of the cooling tower, and finally increasing the amount of air entering the cooling tower, making the cooling efficiency high ;

(8) The kinetic energy of the air coming out of the tower makes it have carrying capacity: its relative humidity can exceed 100%, that is, the air is in a supersaturated state; the power of the air is fully utilized, and the cooling efficiency is high;

(9) Taking the 9000m ² cooling tower supporting the 600MW unit as an example, after the transformation according to the conventional design state, the efficiency of the heat exchange device can be increased by more than 20%, and the temperature of the water exchanged by the cooling water tower can be reduced by more than 1.8°C;

(10) After the transformation, the vacuum of the condenser of the generator can be affected by 0.75kPa, which is equivalent to affecting the coal consumption of the unit for power generation by nearly 2g/kW.h. It can save 5,280 tons of standard coal every year, reduce CO ₂ emissions by no less than 13,728 tons, and generate a carbon emission trading value of 700,000 yuan. The economic benefits of the enterprise and the social environmental protection benefits are very significant, and the investment can generally recover the cost within 1 to 1.5 years.

Description of drawings

Fig. 1 is the internal structure diagram of cooling water tower;

Figure 2 is the actual air intake state of the cooling tower;

Figure 3-bit inlet airflow vector;

Figure 4 The distribution of air velocity on the upper surface of the filler;

Figure 5 optimizes the air temperature distribution at the top of the filler;

Figure 6. The air temperature distribution at the top of the packing after optimization.

Figure number:

1. Air inlet area; 2. Rain area; 3. Filling area; 4. Water distribution system; 5. Nozzle; 6. Air inlet.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1

At present, the model of "single-zone, one-dimensional, uniform wind" is adopted in the design of natural ventilation counterflow wet cooling towers in thermal power plants. This model has a certain deviation from the actual conditions, so that the cooling tower works in the design state (that is, when the cooling capacity reaches 100%) In theory, there is still room for a temperature drop of nearly 4°C. Although various scientific research institutions are exploring measures to improve the heat exchange efficiency of cooling towers, there is still a big gap to approach the theoretical utilization value. The utility model provides a thermal power plant cooling tower heat exchange device and a system for arranging the cooling tower through three-dimensional optimization, which can realize a distance close to the theoretical utilization value and maximize the efficiency of the cooling tower heat exchange device.

Table 1 Effect of 1°C increase in outlet water temperature of the cooling tower on the economics of the unit

unit load 125MW 200MW 300MW 350MW Reduced efficiency 0.31% 0.328% 0.242% 0.23% Coal consumption increased 1.04g/KWh 1.11g/KWh 0.80g/KWh 0.74g/KWh

It can be seen from the above table that the loss of the unit will be huge if the cooling tower outlet water temperature increases by 1°C.

The present invention is based on the fact that the wind in the tower is considered to be one-dimensional and uniform when designing the conventional cooling tower heat exchange device.

The conventional method requires even distribution of water when distributing water to the heating device. The scheme is as follows:

One-dimensional: In the x-y-z rectangular system or r-θ-z cylindrical coordinate system, each calculation parameter only considers the change in the "z" direction, and considers the "x", "y" or "r", "θ" direction no effect.

Uniform air: cooling air blows from the bottom of the cooling tower (very evenly along the radius) to the top of the tower.

Water distribution of the cooling tower: Just because the wind in the tower is considered to be one-dimensional and uniform during design, it is required to distribute water evenly during water distribution. This is the reason why the cooling tower packing is arranged at the same height and the water is evenly distributed.

Dual-zone water distribution: Considering that the temperature in winter in the north is too low, the distribution of single-pump operating water in the outer zone is too small, which will cause the outer packing of the cooling tower to freeze, so the so-called dual-zone water distribution is adopted-when the single pump is running in winter, the inner zone is closed With the water distribution gate, the circulating water only enters the packing in the outer area. It is worth noting that although this design is for the northern climate, the current cooling towers in the southern region use the same structure without exception-the same design software.

Because of this assumption from the beginning of the design, the design and heat transfer enhancement of traditional cooling towers start from the aspect of more uniform water distribution. Xi'an Thermal Engineering Research Institute, Shandong Electric Power Research Institute, Xi'an Jiaotong University and other units did a joint project in 2001 - to study the influence of uneven water distribution on the performance of cooling towers and its calculation method.

The conclusions of the study are:

(1) The heat transfer performance of the cooling tower is related to the uniformity of water distribution, but basically has nothing to do with the environmental parameters and hydraulic load.

(2) The water distribution uniformity coefficient drops from 1 (uniform distribution) to 0.75 (very uneven), which will affect the water temperature of the cooling tower to 4°C.

Table 2 Summary of thermal test results before and after cooling tower transformation by traditional methods

Cooling tower number Cooling tower 1 Cooling tower 2 Cooling tower 3 Cooling tower 4 Cooling tower 5 Cooling tower 6 Watering area (m2) 2000 3500 6500 3500 5000 2500 Total height of the tower (m) 70 90 125 90 110 75 Air inlet height(m) 3.97 5.80 9.00 5.80 7.80 5.00 Thermal efficiency before transformation (%) 70 71.6 82 64 53.3 70.4 Thermal efficiency after transformation (%) 106 105 108 103 102 104

Remarks: It can be clearly seen from the above table that the cooling capacity improvement of the traditional method cooling tower generally does not exceed 10%.

This is the reason why the cooling tower packing is arranged at the same height and the water is evenly distributed. Because of such an assumption from the beginning of the design, the one-dimensional design and three-dimensional enhanced heat transfer of traditional cooling towers are designed from the aspect of more uniform water distribution. Many research institutions have conducted calculations and studies on the influence of uneven distribution of water in cooling towers on the performance of cooling towers. It is found that the heat transfer performance of the cooling tower is related to the uniformity of water distribution, but basically independent of the environmental parameters and hydraulic load. The water distribution uniformity coefficient drops from 1 (uniform distribution) to 0.75 (very uneven), which will affect the cooling tower water temperature up to 4 °C. It is precisely because of the one-dimensional design of the heat exchange device of the cooling water tower that the heat exchange efficiency of the cooling water tower is not fully utilized in the actual heat exchange process. The technology of the utility model starts from the three-dimensional optimization design of the cooling tower heat exchange device based on the above experimental research conclusions, and redesigns the heat exchange device through the three-dimensional simulation calculation and the actual situation of the heat exchange dynamic field calculated according to the simulation.

As shown in Figure 1, a heat exchange device for a cooling water tower in a thermal power plant includes a tower body. Air inlets 6 are respectively arranged on both sides of the bottom of the tower body. The filling area 3 and the water distribution system 4 , the bottom of the water distribution system 4 is provided with a number of nozzles 5 with nozzles facing downwards, and the nozzles 5 are unevenly arranged under the water distribution system 4 . The water distribution system 4 includes a sump, a water inlet pipe, and a water distribution pipe. The water distribution pipes are arranged unevenly, and the water distribution pipes are densely arranged in places where the power field is large, and the ends of the water distribution pipes are connected to the nozzles 5 at the bottom. The nozzles 5 have a uniform caliber, and the water distribution pipes are densely arranged in the part with a large power field, and the water distribution pipes are arranged sparsely in a part with a small power field. The filler area 3 includes a filler bracket and a filler, the filler is arranged on the filler bracket, and the filler height is unevenly arranged, the filler height is high at a position with a large dynamic field, and the filler height is low at a position with a small dynamic field, and the filler height is 0.5m-5m. The main heat transfer effect of the three heat transfer areas of the cooling tower is 10% in the water distribution area, 70% in the fill area, and 20% in the rain area.

As shown in Figure 2-6, Figure 2 is the actual air intake state of the cooling tower; Figure 3 is the inlet airflow vector; Figure 4 is the air velocity distribution on the upper surface of the filler; Figure 5 is the air temperature distribution at the top of the filler before optimization; Figure 6 is the top of the filler after optimization Air temperature distribution, reasonable arrangement of tower heat exchange water distribution system and packing arrangement.

The present invention starts from the three-dimensional optimization design of the heat exchange device of the cooling water tower, through three-dimensional simulation calculation, according to the actual situation of the heat exchange dynamic field calculated by the simulation, redesigns the heat exchange device, and rationally arranges the tower heat exchange water distribution and packing arrangement, so that the heat exchange The wind and water exchange in the device are more matched, and the heat exchange capacity of the original air entering the tower is fully utilized; the increase in the heat absorption of the air leaving the tower reduces the density of the air leaving the tower, thereby increasing the heat exchange capacity of the air inside and outside the cooling tower. The difference in density will eventually increase the amount of air entering the cooling tower; the kinetic energy of the air leaving the tower has the carrying capacity, and the efficiency of the heat exchange device is increased by more than 20% compared with the one-dimensional design.

The invention is used in the field of energy-saving transformation of natural ventilation cooling water towers of thermal power plants or the technical field of direct application of natural ventilation cooling water towers in other industries.

A method for three-dimensional optimal layout of a thermal power plant cooling tower heat exchange device, the steps are as follows:

(1) Collect the original design parameters of the cooling tower, including tower body design parameters and meteorological parameters; Throat diameter, top diameter, design inlet water volume, design circulating water inlet/outlet temperature, annual average tower inlet volume, annual average tower outlet volume, cooling tower design temperature drop, meteorological parameters are: local atmospheric pressure, air dry bulb temperature ,relative humidity.

(2) Collect the actual operating status parameters of the cooling tower; including circulating water volume, inlet water temperature, outlet water temperature, and air temperature.

(3) Adopt the Fulent software platform, use the method of CFD computational fluid dynamics, input the parameters of step (1) and step (2), carry out the modeling to the cooling tower, the modeling takes the center of the bottom of the cooling tower as the origin, the radius is 500m, The space with a height of 900m is the calculation domain. After gridding, 10-15 million calculation points are generated, and the velocity field, temperature field, pressure field, humidity field and dynamic field of the humid air and circulating water in the tower are obtained through calculation;

(4) According to the calculation results, the cooling air heat exchange device and circulating water in the cooling tower are configured according to the cooling capacity of the humid air, and the water distribution and packing arrangement scheme corresponding to the optimal value of the water temperature of the circulating water out of the tower is found, and the circulating water outflow is calculated. The water distribution and packing layout plan corresponding to the optimal value of the water temperature in the tower determines the nozzle diameter and packing layout height in different areas of the cooling water tower. The area corresponding to the large dynamic field of the humid air and circulating water has a large nozzle diameter and a high height of the packing arrangement, and the area where the dynamic field of the humid air and circulating water is small has a small nozzle diameter and a low packing arrangement height.

Figures 5 and 6 are the temperature distribution simulation diagrams before and after the three-dimensional optimization design layout. It can be seen from the figures that the internal temperature distribution of the cooling tower heat exchange device before optimization is very uneven, and the heat of the cooling water tower cannot be well taken away. After optimization, the internal temperature distribution of the cooling tower heat exchange device before optimization is relatively more uniform, the cooling tower water intake heat is relatively more removed, and the heat exchange efficiency is greatly improved.

In this embodiment, the inlet water temperature is set to 36.2°C, the outlet water temperature is 27.1°C before transformation, and 25.2°C after transformation, which is 1.9°C lower than before.

Features of the 3D optimization layout method:

(1) Through the three-dimensional optimization design calculation of the heat exchange device, the heat exchange device is rearranged to give full play to the heat exchange capacity of the original air entering the tower;

(2) The three-dimensional optimized layout makes the heat exchange dynamic field of the heat exchange device tend to be uniform, and the heat absorption of the air leaving the tower increases, which reduces the density of the air leaving the tower, thereby increasing the density difference between the inside and outside of the cooling tower, and finally Increase the amount of air entering the cooling tower;

(3) The three-dimensional optimized layout makes the kinetic energy of the air out of the tower make it have carrying capacity: its relative humidity can exceed 100%, that is, the air is in a supersaturated state;

(4) The performance optimization goal of the three-dimensional optimization design technology of the heat exchange device is to increase the heat exchange efficiency of the cooling tower by no less than 20% on the basis of the design heat exchange capacity (100%), that is, to reach more than 120% of the design value, Make tower water temperature drop to 1.5 ~ 3 ℃.

Experimental Comparison of Retrofitting Cooling Towers with 3D Optimal Arrangement Method

Cooling tower number Cooling tower 1 Cooling tower 2 Cooling tower 3 Cooling tower 4 Cooling tower 5 Cooling tower 6 Watering area (m2) 4000 4000 4500 4500 4500 4500 Total height of the tower (m) 102.2 102.2 105 105 105 105 Air inlet height(m) 8.024 8.024 7.80 7.80 7.80 7.80 Thermal efficiency before transformation (%) 93.7 96.2 98.6 87.2 95.4 97.9 Thermal efficiency after transformation (%) 127.0 134.0 133.4 130.9 128.3 131.8

The thermal efficiency is the efficiency of the design value, and the cooling tower transformation using the three-dimensional optimization design method can increase the cooling capacity by more than 20%. Compared with the traditional "uniform water distribution", it has been significantly improved, and the average outlet water temperature of the cooling tower has dropped by more than 2 degrees.

Example 2

Embodiment 2 is basically the same as Embodiment 1, except that the nozzles 5 have calibers of different sizes, and the calibers are 20-36mm. Adjust the caliber of the nozzle inside the nozzle, and design the distribution as several calibers such as d=25, 27, 28, and 30mm. The part with a large dynamic field and high packing height adopts a large-caliber nozzle, and the part with a small dynamic field and low packing height Use a small diameter nozzle. The settings are more targeted, with high efficiency and low cost. Corresponding rain density, ρ is 5000-13000kg/(m2 h), corresponding to ρ ₁ 5000kg/(m2 h) using a 25mm caliber nozzle, corresponding to ρ ₂ being 13000kg/(m2 h) using a corresponding 30mm caliber, and A density of 5000k/(m2·h) corresponds to (25 ² /5000)/(30 ² /13000) ≈ 1.8 times the density.

Example 3

Embodiment 3 is basically the same as Embodiment ^1. The cooling tower packing is arranged at different heights. The part with a large dynamic field increases the height of the packing, and the part with a small dynamic field reduces the height of the packing. h=2 meters, the lowest point is 0.5 meters. The wind speed in the tower is s=1.0-4.0m/s, and the corresponding seasoning height is 0.5 times of the corresponding speed, namely h=s*0.5.

Example 4

Taking the 9000m ² cooling tower supporting the 600MW unit as an example, after adopting this technology to carry out the three-dimensional optimization arrangement system of the cooling tower heat exchange device, after the transformation compared with the conventional design state, the water temperature of the tower can be reduced by about 2°C; the vacuum of the unit is affected by 0.75kPa ; It is equivalent to affecting the coal consumption of generating units by nearly 2g/kW.h. The annual saving of standard coal is 5,280 tons, and the reduction of CO2 emissions is not less than 13,728 tons. The resulting carbon emission trading volume is 700,000 yuan. The economic and social environmental benefits of the enterprise are very significant. The investment can be recovered in 1 to 1.5 years.

The above has schematically described the invention and its implementation. The description is not restrictive, and the invention can be realized in other specific forms without departing from the spirit or basic features of the invention. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto, and any reference signs in the claims shall not limit the related claims. Therefore, if a person of ordinary skill in the art is inspired by it, and without departing from the purpose of the invention, without creatively designing a structure and an embodiment similar to the technical solution, it shall fall within the scope of protection of this patent. Furthermore, the word "comprising" does not exclude other elements or steps, and the word "a" preceding an element does not exclude the inclusion of "a plurality" of such elements. Multiple elements stated in a product claim may also be realized by one element through software or hardware. The words first, second, etc. are used to denote names and do not imply any particular order.

Claims (6)

1. thermal power plant's cooling column heat-exchanger rig, including tower body, it is characterized in that: the two bottom sides of tower body is respectively arranged with air inlet (6), it is the most upwards air intake district (1), rain belt (2), packing area (3) and water distribution system (4) from bottom, described water distribution system (4) bottom is provided with some nozzles (5) that spout is downward, and described nozzle (5) is uneven is arranged at water distribution system (4) lower section.

A kind of thermal power plant the most according to claim 1 cooling column heat-exchanger rig, it is characterized in that: described water distribution system (4) includes collecting-tank, water inlet pipe and sparge pipe, the uneven setting of sparge pipe, the position sparge pipe that aerodynamic field is big arranges intensive, and sparge pipe termination is connected with the nozzle (5) of bottom.

A kind of thermal power plant the most according to claim 1 cooling column heat-exchanger rig, it is characterised in that: described nozzle (5) uniformly bore, the position sparge pipe big at aerodynamic field arranges intensive, and the position sparge pipe that aerodynamic field is little arranges sparse.

A kind of thermal power plant the most according to claim 1 and 2 cooling column heat-exchanger rig, it is characterised in that: described nozzle (5) bore is 20-36mm.

A kind of thermal power plant the most according to claim 1 cooling column heat-exchanger rig, it is characterized in that: described packing area (3) includes filler support and filler, filler is arranged at filler support, the uneven setting of packed height, the position packed height that aerodynamic field is big is high, and the position packed height that aerodynamic field is little is low.

A kind of thermal power plant the most according to claim 5 cooling column heat-exchanger rig, it is characterised in that: described packed height is 0.5m-2.0m.