RU1778482C - Cooling tower sprinkler - Google Patents

Abstract

Usage: for cooling waste water used in technological plants of various industries. SUMMARY OF THE INVENTION: The gas-permeable elements of the tower sprinkler are made of polymeric material in the form of knitted fabrics. Cloths are installed obliquely to the vertical and remotely relative to each other. The distance between them is (65 ... 175) d. The angle of inclination of the paintings is 2 ... 30. The looped step of the web is (27, .. 30) d, the height of the looped row is (17 ... 23) d, where d is the diameter of the monofilament. 3 ill. 1 tab.

Description

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The invention relates to devices for carrying out heat and mass transfer processes and may find application in the chemical, petrochemical, gas processing, food, energy and other industries.

A known cooling tower with a sprinkler made in the form of at least two perforated sheets sequentially installed along the air flow, for each of which the ratio of the area of the holes to the total area of the site is 0.42 ... 0.7.

The disadvantage of this device is the lack of turbulence of the liquid flowing down on the perforated sheets, which leads to a decrease in heat and mass transfer, as well as a significant material consumption of the sprinkler.

Closest to the proposed device is a cooling tower with a sprinkler made in the form of grids connected by ends to water distribution pipelines, and the sprinkler grids are made with different lengths, stepwise increasing from the periphery of the tower to. center, and placed vertically on both sides of the water distribution pipelines.

The disadvantage of this device is the increased hydraulic resistance due to a reduction in the distance between two adjacent water distribution pipelines, as well as the absence of liquid-air contact on the inner surfaces of the grid at each water distribution pipeline.

The disadvantage is the increase in material consumption, because in this design of 4 grid planes for each water X M 00

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limiter really only work 2 plane.

The aim of the invention is to reduce the hydraulic resistance and specific material consumption of the cooling tower sprinklers.

The goal is achieved by the fact that the elements of the sprinkler are installed obliquely to the vertical and are made of monofilaments in the form of knitted webs with a loop step equal to (27 ... 30) d and a loop height equal to (17 ... 23) d, where d is the diameter of the monofilament, while the distance between the webs is (65 ... 175) d, and the angle of inclination of the webs is 2 ... 3 °.

The spacing of the canvases relative to each other at a distance of 65 ... 175 monofilament diameters provides the minimum hydraulic resistance, and the slope of the plates by 2 ... 3 with respect to the vertical walls of the tower tower ensures that cooled water enters all without exception of the web.

Figure 1 presents a section of the tower with the image of the contacting flows; figure 2 is a fragment in a busy canvas, where a is a top view; b - side view; in Fig.Z is a section of the sprinkler from the occupied canvases, where G is air; L- chilled water; a - the angle of inclination of the canvas to the vertical wall of the housing; ... 3 °.

Cooling tower, including housing 1, inside which along the air flow there is a chilled water collector 4, sprinkler 2 in the form of polymer monofilaments spaced in occupied cloths, water supply and water distribution pipes above it with spray holes 3. water trap 5, valves torus 6.

Figure 2 shows a fragment in a web that the sprinkler is made of, where A is the height of the loop series and B is the loop step. Fig. 3 shows a section of the sprinkler from the embedded canvases with the image of the contacting flows.

The cooled water enters into the occupied web, sequentially rolls from overlying to the underlying loop rows of each web, where it is cooled by an air stream.

The device operates as follows.

Hot water from a water distributor with spraying devices (nozzles) enters the upper (along the air) part of the sprinkler in the form of drops. The droplets collide with knitted webs, sequentially roll from overlying to the underlying loop rows of each weave, and are cooled by the air flow from an exhaust fan between the webs that are spaced apart from each other. The dropping of droplets from each loop series contributes to the intense interchangeability of the boundary layer. The spacing of the blades relative to each other within 65 ... 175 diameters of the monofilament provides minimal hydraulic resistance.

Example. The knitted fabrics were made of polypropylene monofilaments according to TU 6-06-527-86 with a diameter of 0.3 mm; a complex thread was used as an escort. Cloths were made by the half-way method. The weight of 1 m of the canvas was 187 g. The manufacture of paintings was carried out on standard equipment. In the canvases, they were mounted in a device measuring 500x1000x6000 mm (an element of an industrial cooling tower). The angle of inclination of the plates from the vertical side wall was 0 ... 4 °. In the occupied canvases were fastened in the apparatus using strings. The air velocity in the column varied from 0.9 to 2.0 m / s, the irrigation density varied within 6 ... 10. m3 / (m2h).

The table shows the dependences of the hydraulic resistance of the webs on the distance between them, air velocity, irrigation density and the angle of inclination of the webs.

Thus, the invention reduces hydraulic resistance and material consumption.

Claims (1)

The claims The cooler sprinkler containing remotely installed gas-permeable elements made of polymer material, characterized in that, in order to reduce hydraulic resistance and specific material consumption, the sprinkler elements are mounted obliquely to the vertical and are made of monofilament in the form of knitted canvases with loop in increments equal to (27 ... 30) d, where d is the diameter of the monofilament, while the distance between the webs is (65 ... 175) d, and the angle of inclination of the webs is 2 ... 30, L l 4 - -r /  A Figure 1 m- Jj