RU193253U1 - SELF-DISTRIBUTED LIQUID VAPOR COOLING FAN - Google Patents

Abstract

The utility model is intended for cooling circulating water and can be used in the energy, chemical, petrochemical, metallurgical and food industries. The fan evaporative cooling tower with self-distribution of liquid consists of a housing, a fluid supply manifold, a fluid collection tank and a fan, the housing includes a sprinkler, consisting of tubular elements welded together at the end surfaces. The tubular elements are corrugated plates located at an angle of 30-45 ° to the base of the body and installed symmetrically relative to each other over the entire height of the sprinkler, while the corrugations are made in the form of a rounded profile with round holes located on the protrusions of the corrugations. The technical result is to increase the efficiency of heat and mass transfer processes during water cooling due to the uniform distribution of the liquid phase over the cross section of the tower.

Description

The utility model is intended for cooling circulating water and can be used in energy, chemical, petrochemical, metallurgical and food industries.

Known vertical vortex nozzle cooling tower [see patent RU 2267729, F28C 1/02, 2003], containing an axial fan with profiled blades that swirl the air flow, a casing in the form of a pipe, a separator of water drops, a filter, a circulation pump, a comb and nozzles for spraying liquid in the volume of the pipe. A feature of this cooling tower is that the cooling tower is equipped with a trap for collecting a falling liquid film on the inner surface of the pipe, and the fan casing at the bottom of the pipe is placed with a gap in the trap.

The disadvantage of the analogue is the low specific surface contact of the phases, leading to a decrease in the efficiency of the process of cooling the circulating water.

Known fan cooling tower [see patent RU 2037764, F28C 1/00, 1995], comprising a casing with air inlet windows in the upper part, in which a central air exhaust pipe is installed, an irrigator with centrifugal jet nozzles, the outlet openings of which are directed upwards, a two-stage annular screen located above the nozzles. A distinctive feature of this device is a screw nozzle made of fabric material located under the sprinkler.

A disadvantage of the analogue is a significant droplet drop due to an increase in air velocity due to a decrease in the cross section of the working medium interaction zone due to the vent pipe installed there.

The closest to the utility model in terms of technical nature and the achieved result is a fan cooling tower with a water recycling system [see patent RU 2659011, F28C 1/00, 2018], comprising a housing, a spray device, a liquid collection tank and a fan. The housing consists of two parts - the upper part, including the sprinkler and the droplet separator, between which there is a collector of the spraying device with solid nozzles, and the lower part, in which there is a liquid collection tank for collecting cooled water with a fan installed on it.

The disadvantage of the prototype is the low degree of redistribution of fluid along the cross section of the tower, leading to a decrease in the efficiency of the process of cooling water.

The objective of the utility model is the development of a fan evaporative cooling tower with self-distribution of liquid, which eliminates the disadvantages of analogues and prototype.

The technical result is to increase the efficiency of heat and mass transfer processes during water cooling due to the uniform distribution of the liquid phase over the cross section of the tower.

The technical result is achieved by the fact that in a fan evaporative cooling tower with a self-distribution of liquid, consisting of a housing, a fluid supply manifold, a fluid collection tank and a fan, the housing includes an irrigation device consisting of tubular elements welded together at the end surfaces. According to this utility model, tubular elements are corrugated plates located at an angle of 30-45 ° to the base of the body and installed symmetrically relative to each other over the entire height of the sprinkler, while the corrugations are made in the form of a rounded profile with round holes located on the corrugation protrusions.

The essence of the utility model is illustrated by the following drawing.

The drawing shows the proposed fan evaporative cooling tower with self-distribution of liquid.

The numbers in the drawing indicate:

1 - housing;

2 - collector fluid supply;

3 - tank for collecting liquid;

4 - fan;

5 - sprinkler, consisting of corrugated plates.

The self-distributing liquid evaporative cooling tower contains a housing 1 with a sprinkler installed in it, which consists of inclined corrugated plates 5 with round drain holes located on the corrugations protrusions, a liquid supply manifold 2, a fan 4 and a liquid collection tank 3 located under the lower corrugated plate 5. Hot water is introduced through a round hole in the upper part of the side wall of the housing 1 in the center between the first and second corrugated plates 5.

The proposed fan evaporative cooling tower with self-distribution of liquid works as follows.

Water through the fluid supply manifold 2, made in the wall of the housing 1, is distributed over the corrugated plate 5. The presence of corrugations on the surface of heat and mass transfer creates a significant turbulization of the moving fluid at a relatively low flow rate. The fluid flow moves in the cavities of the corrugated plates 5 from top to bottom from one part of the apparatus to another. At the same time, part of the liquid falls down along the surface of the casing wall, the other part enters the lower corrugated plate 5. At the same time, the flowing film of water is in contact with the flow of ascending air created by the fan 4. Openings for the passage of cooling air are made on the protrusions of the corrugated plates 5. Excess water falls into these holes and, in contact with air, are distributed in the volume of the sprinkler. Air passes through the holes of the plate, spraying water droplets in different directions, thereby spraying the liquid throughout the sprinkler. Moreover, the film flowing down the surface of the corrugated plates 5 is destroyed due to the interaction with the generated jets and drops of liquid, and a developed constantly updated phase contact surface is created. Chilled water from the surface of the corrugated plates 5 flows into the tank for collecting liquid 3.

In the proposed fan evaporative cooling tower compared with the prototype creates a more uniform distribution of the contacting phases over the cross section of the apparatus due to the installation of corrugated plates with holes on the protrusions of the corrugations. Numerical studies of two-phase phase interaction show almost complete mixing in the cross section of the apparatus at relatively low air velocities. This indicates the creation of a high specific phase contact surface, affecting the efficiency of the water cooling process.

Thus, when using corrugated plates, self-distribution of liquid is observed over the cross section of the tower, which leads to an increase in the efficiency of heat and mass transfer processes during cooling of the circulating water.

Claims (1)

Self-distributing fan evaporative cooling tower, consisting of a housing, a fluid supply manifold, a fluid collection tank, and a fan, the housing includes an irrigation device consisting of tubular elements welded together along the end surfaces, characterized in that the tubular elements are corrugated plates located at an angle of 30-45 ° to the base of the body and installed symmetrically relative to each other over the entire height of the sprinkler, while the corrugations are made in the form of a rounded profile with from Erste round shape, located on the ridges of the corrugations.

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