RU2677433C1 - Cooling tower sprinkler unit - Google Patents

Abstract

FIELD: water supply.SUBSTANCE: invention relates to the field of recycled water supply, namely to the structural elements of cooling towers and other apparatus for heat and mass transfer between liquid and gaseous media. Block of the cooling tower sprinkler contains the vertically corrugated sheets with faceted corrugations, which are fastened together, where the latter ones when forming the corrugated sheets form the channels between each other, each channel being formed by the rectilinear input, output, bypass and intermediate sections, the axes of the input and output sections of each channel are located along the vertical line that is common for them, input, output and the bypass sections of the channels in the cross section are made in the shape of a hexagon, the intermediate sections adjacent to the inlet and outlet sections are inclined, they form the angle from 40 up to 60° with the above-mentioned common vertical line and are communicated to each other by two vertical diamond-shaped cross-sectional intermediate sections, which are communicated to each other and to the inclined intermediate sections by means of vertical bypass sections, wherein the inclined intermediate sections of the adjacent vertical corrugated sheets are formed with the opposite inclination to the vertical line in order to form triangular cross sections of intermediate sections communicating with each other at the intersection thereof, the edges of the corrugations forming intermediate sections are made with transverse corrugations, and the edges of the corrugations forming a cross section in the shape of a hexagon are made flat, while on the faces of the corrugations of the input, output and bypass sections of adjacent vertical corrugated sheets hollow convexes and depressions are made, by means of which one vertical corrugated sheet is inserted into each other in the depressions of an adjacent vertical corrugated sheet, and the vertical corrugated sheets are thus fixed relative to each other.EFFECT: as a result, an increase in the intensity of heat and mass transfer is achieved with an increase in the reliability of the cooling tower.1 cl, 5 dwg

Description

The invention relates to the field of recycled water supply, and in particular to the structural elements of cooling towers and other apparatus for heat and mass transfer between liquid and gaseous media.

In evaporative cooling towers, drip and film type sprinklers made of wooden slats, as well as of flat or wavy asbestos cement sheet shields up to 7 mm thick, are widespread (see, for example, the book B. B. Forforovsky, V. B. Farforovsky. power plants, Leningrad, Energy, 1972).

However, these sprinklers have a large material consumption, high hydraulic resistance to the flow of cooling air, low specific surface contact of the phases and low operational reliability due to the limited water resistance of wooden sprinklers and the delamination of asbestos-cement sprinklers during defrosting. In addition, the use of asbestos is harmful in terms of its negative impact on the environment.

Also known are sprinklers made of polymeric materials, for example, irrigation devices made in the form of a block of plastic pipes (see, for example, RF No. 2141616, class F28F 25/00, publ. 20.11.1999 and No. 21411617, class F28F 25/08, publ. 11/20/1999)

These sprinklers are more effective and water resistant. However, these sprinklers also have a relatively high aerodynamic drag and, in addition, the drawback of these sprinklers is the difficulty in assembling the unit during its manufacture.

The closest to the invention in technical essence and the achieved result is a cooling tower sprinkler block containing vertical corrugated sheets bonded to each other with faceted corrugations, the channels being formed last when corrugated sheets are bonded to each other (see US Pat. No. 5124087, class B01F 3/04 , published on June 23, 1992).

The implementation of the cooling tower sprinkler block described above made it possible to increase the reliability of operation in winter by reducing ice freezing and redistributing cooling water from the periphery to the center. However, this led to an uneven distribution of the contacting flows of water and cooling air over the sprinkler cross section and, as a result, to an increase in aerodynamic drag and a decrease in the intensity of heat and mass transfer.

The technical problem of the invention is to reduce aerodynamic drag with a more uniform film distribution of water flows along the walls of the pipe-shaped channels of the cooling tower sprinkler blocks.

The technical result achieved by using the invention is to increase the intensity of heat and mass transfer while increasing the reliability of the cooling tower irrigator.

This problem is solved, and the technical result is achieved due to the fact that the tower irrigation unit contains vertical corrugated sheets bonded to each other with faceted corrugations, the channels being the last to bond the corrugated sheets to each other, with each channel being formed by straight-line input, output, bypass and intermediate sections, the axes of the inlet and outlet sections are located along a common vertical line for them, the inlet, outlet and bypass sections of the channels in a cross section made in the form of a hexagon, adjacent to the input and output sections, the intermediate sections are inclined, form an angle from 40 ° to 60 ° with the above vertical line and are interconnected by two vertical rhomboid-shaped cross sections of intermediate sections communicated with each other and with inclined intermediate sections by means of vertical bypass sections, the inclined intermediate sections of adjacent vertical corrugated sheets being made with the opposite inclination relative to to the vertical line with the formation of intermediate sections triangular in the cross section, communicating with each other at the intersection, the faces of the corrugations forming the intermediate sections are made with transverse corrugations, and the faces of the corrugations forming a cross section in the form of a hexagon are made flat, while on the corrugations of the inlet, outlet and bypass sections of adjacent vertical corrugated sheets are hollow convexities and depressions, by which by inserting into each other the convexity of one rtikalnogo corrugated sheet disposed in cavities adjacent thereto vertical corrugated sheets, corrugated sheets and vertical thus fixed relative to each other.

In the study of the work of irrigators assembled from vertical corrugated sheets, it was revealed that it is possible to create a structurally simple irrigation unit assembled from similar corrugated sheets, which during transportation take up little space due to their dense stacking on each other. When assembling the irrigator, special layout of the sheets is not required. From the corrugated sheets, sprinkler blocks consisting of vertically mounted sheets rigidly fixed relative to each other with the help of bulges and depressions made on the sheets are easily and quickly assembled at the installation site of the tower. The implementation of the sprinkler with the straight lines formed by corrugations of the same type, sections of channels formed at an angle to each other, formed by corrugations of adjacent sheets, allows to obtain channels made in the form of a broken line, and the input, output and bypass sections of each of the channels in cross section are made in the form hexagon, and the intermediate sections located between them in the cross section are made rhomboid, located between the channels triangular in the cross section, located crosswise and communicating with each other at the point of their intersection, the axes of the input and output sections of each channel are located along a common vertical line to them, the axes of adjacent sections triangular in cross section form an angle from 40 ° to 60 ° with the above common vertical line and are interconnected by means of two vertical intermediate sections communicated with each other and with intermediate sections installed at an angle through vertical bypass sections with a cross section in the form of a hexagon, a corrugation face, about The intermediate sections are rhomboid and triangular in cross section and are made with transverse corrugations, and the corrugations of hexagonal cross sections of vertical bypass sections are smooth, while hollow convexities and depressions are made on the edges of the corrugations of the input, output and bypass sections of adjacent vertical corrugated sheets, by which, by inserting into each other, the convexities of one sheet are located in the hollows of the sheet adjacent to it, and the vertical corrugated sheets are thus formed fixed relative to each other.

As a result, it is possible to create cooling tower irrigation units with relatively low aerodynamic drag, and, on the other hand, to create a rigid irrigation structure from thin sheets, while ensuring high heat and mass transfer efficiency. As a result of interaction with the protrusions and flows between the triangular channels, the air flow intensively swirls. Drops of water falling from above, falling into a swirling stream of air, are discarded onto the channel walls and flow down them in the form of a film, which makes it possible to achieve high heat transfer efficiency.

In the course of the study, the feasibility of performing these sections of the channels at an angle to the vertical from 40 ° to 60 ° was confirmed. Performing an inclination from a vertical of less than 40 ° does not allow for such a swirling of the flow that all water droplets are deposited on the walls of the channels already in their upper part, which leads to a decrease in the heat transfer efficiency and the need to increase the height of the sprinkler block. Performing a tilt at an angle to the vertical of more than 60 ° makes it possible to intensify turbulization, but at the same time the aerodynamic drag increases and, as a result, the heat exchange efficiency between the cooled water and the cooling air decreases. Thus, the set of essential features described above made it possible to obtain the most optimal result between the heat transfer efficiency and aerodynamic drag.

In FIG. 1 is a side view photo of a corrugated sheet of a sprinkler block.

In FIG. 2 is a perspective view of a corrugated sheet of a sprinkler unit.

In FIG. Figure 3 shows a photo of a top view of the cooling tower sprinkler block.

In FIG. 4 is an enlarged axonometric view of the upper portion of the corrugated sheet of the cooling tower sprinkler block.

In FIG. 5 is an enlarged axonometric view of the middle portion of the corrugated sheet of the cooling tower sprinkler block.

The cooling tower sprinkler block contains vertical corrugated sheets 1 fastened together and faceted corrugations 2.

Corrugations 2 when fastening the corrugated sheets 1, channels 3 are formed between each other. Each channel 3 is formed by rectilinear input 4, output 5, bypass 6 and intermediate 7 sections.

The axis of the input 4 and output 5 sections of each channel 3 are located along a common vertical line for them.

Input 4, output 5 and bypass 6 sections of channels 3 in cross section are made in the form of a hexagon. The intermediate sections 7 adjacent to the input 4 and output 5 sections are made oblique, form an angle α from 40 ° to 60 ° with the above-mentioned common vertical line and are interconnected by two vertical rhomboid-shaped cross sections of the intermediate sections 7 communicated with each other and with the inclined intermediate sections 7 by means of vertical bypass sections 6, the inclined intermediate sections 7 of adjacent vertical corrugated sheets 1 being made with the opposite inclination with respect to the vertical line and to form a triangular cross-section of the intermediate portions 7, interconnected at their point of intersection.

The faces of the corrugations 2, forming the intermediate sections 7, are made with transverse corrugations 8, and the faces of the corrugations 2, forming a cross section in the form of a hexagon, are made flat.

On the faces of the corrugations 2 of the inlet 4, outlet 5 and bypass sections 7 of the adjacent vertical corrugated sheets 1, hollow convexities 9 and depressions 10 are made, by which by inserting into each other the convexities 9 of one vertical corrugated sheet 1 are located in the depressions 10 of the adjacent vertical corrugated sheet 1, and the vertical corrugated sheets 1 are thus fixed relative to each other.

Thus, the cooling tower sprinkler block described above is formed.

The sprinkler of the cooling tower operates as follows.

Cooling air comes from the bottom of the tower due to natural draft in tower towers and forced movement in fan cooling towers. Cooled water from above from the sprinkler blocks is uniformly sprayed over the area formed by the sprinkler blocks from corrugated sheets 1. In the sprinkler blocks, heat and mass transfer between water and air droplets moving in countercurrent occurs on the surface of pipe-shaped channels 3.

After the contact of water droplets with the walls of the pipe-shaped channels 3 as a result of interaction with the transverse corrugations 8, the air flow swirls. The liquid, as a result of interaction with a swirling flow of air and the walls of the corrugations 2, is deposited on the walls and moves along the walls of the tube-shaped channels 3 in the form of a film.

This invention allows to solve the problem of creating a tower sprinkler convenient for installation and transportation while simplifying and cheapening installation and repair work in cooling towers and can be used in devices for cooling water in water-circulation systems of industrial enterprises with direct contact of cooled water and its cooling air with high the intensity of heat and mass transfer while increasing the reliability of the cooling tower sprinkler.

Claims (1)

Cooling tower sprinkler unit containing vertical corrugated sheets bonded to each other with faceted corrugations, the latter being formed by channels when bonding the corrugated sheets to each other, characterized in that each channel is formed by rectilinear inlet, outlet, bypass and intermediate sections, the axis of the input and output sections of each channel located along a common vertical line for them, the input, output and bypass sections of the channels in cross section are made in the form of a hexagon adjacent to the entrance the intermediate and output sections, the intermediate sections are made oblique, form an angle from 40 to 60 ° with the above-mentioned common vertical line and are interconnected by two vertical diamond-shaped cross sections of the intermediate sections communicated with each other and with the inclined intermediate sections by means of vertical bypass sections, inclined intermediate sections of adjacent vertical corrugated sheets are made with the opposite slope with respect to the vertical line with the formation of a triangular in the cross section of the intermediate sections communicating with each other at the place of their intersection, the faces of the corrugations forming the intermediate sections are made with transverse corrugations, and the faces of the corrugations forming a cross section in the form of a hexagon are made flat, while on the edges of the corrugations of the input, output and Hollow sections of adjacent vertical corrugated sheets are hollow convexities and depressions, by which by inserting into each other the convexities of one vertical corrugated sheet are located in the valleys of the adjacent vertical corrugated sheet, and the vertical corrugated sheets are thus fixed relative to each other.

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