RU2224968C2 - Cooling tower sprinkler - Google Patents

Abstract

FIELD: structural members of heat-exchange apparatuses, for example, cooling towers. SUBSTANCE: the cooling tower sprinkler has latticed plates with corrugations in the form of continues wave, frames and stiffening strips in the perimeter of the plates and along the middle horizontal. At assembly the adjacent plates are installed at angle to one another, making up 3 to 5 deg., and the cells of the latticed plates in projection to the horizontal plane are made square ones measuring 20x20...30x30 mm. Besides, the corrugations of the adjacent plates may be oriented at an angle to one another or be oriented in the same direction. EFFECT: enhanced degree of water cooling and stiffness of the structure. 3 cl, 2 dwg

Description

The invention relates to heat and mass transfer, in particular to structural elements of heat and mass transfer apparatus, for example cooling towers, and can be used in apparatus for cooling water in water cycles of industrial enterprises with direct contact of environments.

Known sprinkler of lattice sheets with corrugations in the form of a continuous wave, and the corrugations are directed vertically, and in the plan form through channels of one form or another [1].

The disadvantage of this sprinkler is that the intensity of the heat and mass transfer processes is low, the rigidity of the structure is low.

Known nozzle for heat and mass transfer apparatus containing volumetric elements made of parallel mutually intersecting threads, and the elements in cross section have a profile of a versatile triangle [2].

The disadvantages of this nozzle are the low intensity of heat and mass transfer and the rigidity of the structure under the influence of the circulating water heated in the production; deformation of the nozzle elements is possible.

The closest to the proposed technical essence and the achieved effect is a sprinkler with corrugations at an angle to the edges of the sheets, along the perimeter of which along the middle horizontal there are frames and stiffness strips with different arrangement of corrugations of adjacent sheets along the height of the sprinkler [3].

The disadvantage of the sprinkler is the insufficiently high intensity of heat and mass transfer and rigidity of the structure.

The application of the invention will allow to achieve a deeper degree of cooling of the circulating water in the cooling towers of various types due to high temperature gradients in the cooling process, as well as to increase the rigidity of the sprinkler as a whole.

This goal is achieved in that the tower sprinkler contains lattice sheets with corrugations in the form of a continuous wave, a frame and a stiffener along the perimeter of the sheets and along the middle horizontal, and during assembly adjacent sprinkler sheets are set at an angle to each other of 3 ... 5 ° and the cells of the lattice corrugated sheets in the projection onto the horizontal plane are made square 20 × 20 ... 30 × 30 mm. In this case, the corrugations of adjacent sheets can be oriented at an angle to each other or in the same direction.

The location of adjacent sheets at an angle to each other contributes to the development of an interphase surface per unit volume, along which heat and mass transfer between water, steam and a solid surface of the sprinkler occurs. The magnitude of this surface is one of the components of the intensity of this process. In addition, each pair of adjacent sheets with attachment points forms a figure - a triangle with high rigidity.

The optimum value of the angle between adjacent sheets of 3 ... 5 ° was revealed. A decrease in this angle (less than 3 °) leads to a denser packing of the sheets in the sprinkler, to an increase in the material consumption of the structure, to an increase in the hydro- and aerodynamic resistance of the entire sprinkler, which is undesirable. An increase in the angle (more than 5 °) leads to a decrease in the number of sheets per unit volume of the sprinkler, which leads to a decrease in the interfacial surface and, accordingly, to a decrease in the cooling capacity of the sprinkler, i.e. to a decrease in the intensity of heat and mass transfer.

As shown by the results of the work of the sprinkler, the square cells of the lattice sheets / in the projection onto the horizontal plane / rationally performed with sizes of 20 × 20 ... 30 × 30 mm. A decrease in these sizes (the side of the square is less than 20 mm) leads to an increase in the aerodynamic resistance of the sprinkler and its mass, which is not always positive for the operation of the tower. An increase in this value (the side of the square is more than 30 mm) leads to a decrease in the value of the interfacial surface, and hence the intensity of heat and mass transfer.

The invention is illustrated by drawings.

Figure 1 presents a schematic representation of a side view of the irrigator.

Figure 2 - diagram of the main view of the irrigator.

The sprinkler of the cooling tower consists of lattice corrugated sheets 1 installed at an angle of 3 ... 5 ° to each other. The adjacent sheets are set so that their corrugations are oriented at an angle to each other or so that the corrugations can have the same direction.

The sprinkler of the cooling tower operates as follows. Water heated in production is evenly sprayed over the surface of the irrigator. Drops of water, falling onto a solid surface of the irrigator from a certain height, are crushed into smaller ones, while some spread on the surface of the lattice sheets - this is determined by the “angle of attack” between the direction of drop fall / most often the vertical / and the direction of the solid surface in the vicinity of the drop. In addition, there is a process of overflowing drops or films of water on the underlying lintels of the lattice sheets, their further crushing, merging, etc.

At the same time, a flow of cooling air rises towards the movement of the droplets and the liquid films, which flows around the gratings of the sheets with water films on their surfaces, intensively cooling them.

With the interaction of the complex movements of water droplets from above and the ascending air flow, the circulating water is intensively cooled to the required parameters, which makes the output of the main production increase.

Sources of information

1. The patent of Germany No. 3839372, F 28 F 25/08, 1990.

2. RF patent №2122168, F 28 F 25/08, 1998.

3. RF patent No. 2133427, F 28 F 25/08, 1998.

Claims (3)

1. The sprinkler of the cooling tower, containing lattice sheets with corrugations in the form of a continuous wave, frames and stiffness bands around the perimeter of sheets and along the horizontal horizontal, characterized in that during assembly adjacent sheets are set at an angle to each other of 3 ... 5 °, and the cells of the lattice corrugated sheets in the projection onto the horizontal plane are made square 20 x 20 ... 30 x 30 mm. 2. The sprinkler of the cooling tower according to claim 1, characterized in that the corrugations of adjacent sheets are oriented at an angle to each other. 3. The cooling tower sprinkler according to claim 1, characterized in that the corrugations of adjacent sheets are oriented in the same direction.

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