CN201392107Y - Air duct used for fresh air supply in cooling tower - Google Patents

Abstract

The utility model discloses an air duct used for fresh air supply in a cooling tower, belonging to the thermal power generation and nuclear power generation field, in particular to an air duct which is used for guiding the fresh air and arranged at an air inlet of a natural ventilation and counterflow wet cooling tower. In the utility model, the air duct is arranged in the cooling tower and extends to the central zone from the outer edge of the air inlet of the cooling tower, and a layer of soft rubber pad is arranged on the air duct. The air duct can be circular, quadrangular, triangular, and semicircular. The installation number, installation position and geometric dimension of the air duct can be determined according to the aerodynamic field in the cooling tower. By utilizing the air duct, the fresh air can be guided into the cooling tower, the cooling efficiency of the cooling tower is improved, the aerodynamic field in the cooling tower is improved, the water flow distribution law and the air distribution law can achieve the optimal match, and the temperature of the circulating water is lowered.

Description

A kind of inner guide duct of mending new wind of cooling tower that is used for

Technical field

The utility model belongs to thermal power generation and nuclear electric power generation field, particularly relates to the guide duct that a kind of adverse current wet cooling tower air inlet can replenish new wind.

Background technology

The gravity-flow ventilation adverse current wet cooling tower profile of using at present is hyperbolic-type, the bottom natural air inlet.Recirculated water enters cooling tower filler layer position and flows downward, and air upwards flows from bottom inlet, absorbs the heat of recirculated water, finishes the process of heat and mass transfer, makes the temperature of recirculated water reduce.Along with the volume of cooling tower is increasing, the diameter of air inlet is above hundred meters.The aerodynamic field of cooling tower inside becomes extremely inhomogeneous like this, causes the heat exchange effect of cooling tower central region to weaken.

Chinese patent Z102270484.1 discloses a kind of " cooling tower bottom air inlet fairing ", it is a kind of device that utilizes longitudinal baffle and lateral partitions to carry out wind-guiding, can alleviate of the influence of extraneous crosswind, but improve not obvious for the aerodynamic field of cooling tower inside for the cooling tower air intake.

Summary of the invention

The purpose of this utility model is to overcome the deficiency of above-mentioned existing equipment technology, and a kind of operating efficiency that can import cooling tower inside to new wind, improve cooling tower is provided.

The utility model is realized in the following manner:

At the cooling tower air inlet guide duct is set, extends to tower inside center zone by the air inlet outer rim, guide duct is provided with the soft system rubber blanket of one deck.

The shape of guide duct can adopt shapes such as circle, quadrangle, triangle, semicircle.

The aerodynamic field of the quantity of guide duct, physical dimension, installation site and tower inside has relation.The physical dimension of guide duct is: maximum longitudinal size M is: $\frac{1}{2}h\≤M\≤\frac{2}{2}h,$ Maximum transverse size N is: $\frac{1}{2}l\≤N\≤l,$ Length L is: $\frac{2}{4}R\≤L\≤\frac{4}{5}R,$ Wherein h is a cooling tower air inlet height, and l is a cooling tower air inlet herringbone column maximum spacing, and R is the cooling tower bottom radius.Adopt the utility model, cooling tower inner air aerodynamic field is even, and the air themperature of central area reduces, and this regional circulating water temperature reduces, and the heat exchange effect improves.

The material of guide duct adopts metal material such as steel construction piece, also can adopt nonmetallic materials such as reinforced concrete structure or plastics, fiberglass.

Guide duct is positioned at the rain belt of cooling tower, can produce bigger noise, at guide duct surface coverage one deck soft rubber pad, with noise-decreasing.

The inner guide duct of the cooling tower that the utility model is set forth, can guarantee after the employing that the aerodynamic field in the whole cooling tower space is even, realize that the regularity of distribution of current and the regularity of distribution of air reach optimum Match, heat transfer and mass transfer have been strengthened, thereby can improve cooling effectiveness effectively, reduce the temperature of recirculated water

Description of drawings

Fig. 1 is that the guide duct of the utility model cooling tower air inlet is arranged schematic diagram;

Fig. 2 is that guide duct cross section of the present utility model is circular structural representation;

Fig. 3 is tetragonal structural representation for guide duct cross section of the present utility model;

Fig. 4 is leg-of-mutton structural representation for guide duct cross section of the present utility model;

Fig. 5 is semicircular structural representation for guide duct cross section of the present utility model.

Wherein 1, cooling tower, 2, guide duct, 3, rubber blanket.

The specific embodiment

Embodiment 1: as shown in Figure 1, guide duct 2 is installed on cooling tower 1 inside, extends to the central area from the edge.Thereby through the new wind of rain belt, the process guide duct does not directly enter the inside center zone of cooling tower, realizes the heat and mass transfer of central area in new wind and the tower, has improved heat-transfer effect, and has eliminated the inhomogeneities of aerodynamic field.For example certain film-cooled heat is 4000m ²Cooling tower, adopting guide duct quantity is 11, length is 8 meters.Guide duct 2 be shaped as Fig. 2, Fig. 3, Fig. 4, shown in Figure 5 any one.Because guide duct is positioned at the rain belt of cooling tower, can produce bigger noise, at guide duct 2 surface coverage one deck soft rubber pads 3, with noise-decreasing.

Embodiment 2: identical in embodiment 1, the quantity of different is guide duct is 9, and length is 20 meters.

Claims (4)

1, a kind of inner guide duct of mending new wind of cooling tower that is used for is characterized in that guide duct is positioned at cooling tower bottom air inlet mouth place, extends to the central area by cooling tower air inlet outer rim, and guide duct is provided with the soft system rubber blanket of one deck.

2, a kind of inner guide duct of mending new wind of cooling tower that is used for according to claim 1 is characterized in that, described guide duct be shaped as one of following shape: circle, quadrangle, triangle, semicircle.

According to the described a kind of inner guide duct of mending new wind of cooling tower that is used for of claims 1, it is characterized in that 3, described guide duct is made of metal material or reinforced concrete structure or plastics or glass-reinforced plastic material.

4, according to claims 1 described a kind of inner guide duct of mending new wind of cooling tower that is used for, it is characterized in that the physical dimension of described guide duct is: maximum longitudinal size M is: $\frac{1}{2}h\≤M\≤\frac{2}{2}h,$ Maximum transverse size N is: $\frac{1}{2}l\≤N\≤l,$ Length L is: $\frac{2}{4}R\≤L\≤\frac{4}{5}R,$ Wherein h is a cooling tower air inlet height, and l is a cooling tower air inlet herringbone column maximum spacing, and R is the cooling tower bottom radius.

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