SU1695117A1 - Ejector cooler - Google Patents

Abstract

This invention relates to contact heat exchangers used in water recycling systems of high productivity in the chemical, metallurgical and energy complexes of the country. EFFECT: invention improves efficiency by reducing drip entrainment. The ejection hopper contains walls 5 of the tower, in the lower part of which is placed the cooling water tank 6. Along the perimeter of the wall 5, an air inlet window 7 is made with a lower longitudinal shield 8 and an upper shield 9. Windows 7 are divided by partitions 10 into sections. A vertical X-shaped partition 11 with a horizontal roof 12 is installed inside the tower. 4 4 silt

Description

The invention relates to contact heat and mass transfer devices used in circulating water supply systems of high productivity of the chemical, metallurgical and energy complexes of the country.

Known cooler containing the tower, on the side surface of which are air inlet window (1). The air enters the cooling tower at the expense of the natural draft of the tower or at the expense of the work of the fan. Modern coolers — cold and expensive constructions. In the fan cooling towers, the fans are often out of order.

An ejection cooler is known comprising a housing with nozzles for input and output of the interacting phases, a contact zone with nozzles formed by inclined, downwardly extending plates. This device provides the best heat removal due to high values of ejection coefficients and heat and mass transfer, as well as intensive turbulization of phases.

In this device, only one is used as the working side; therefore, high-performance apparatuses (500 m3 / h) are large in size, besides, the range of capacity control is small. The latter is explained by the fact that high ejection coefficients (1000, in the case of volume coefficients) are provided only at fluid pressure from 0.25 to 0.5 MPa. The closest to the technical essence and the achieved result is an ejection cooler containing a tower. with a quadrilateral cross-section, air inlet windows placed in the lower part of its lateral surface and provided with longitudinal shields in the upper and lower inclined inside the tower, coolant collectors with spray force nkami placed outside the tower opposite the windows installed in the tower vertical partition dividing the tower into sections.

This device is efficient and productive (by water) and is easy to maintain.

However, the design of the apparatus does not imply the use of the sides as workers; with a strong wind (15 m / s), part of the spray is blown through long (several tens of meters) longitudinal air inlet windows; part of the ejected air leaves the working area of the cooler on the inner side of the wall with non-use

called heat and mass transfer potential; a small range of performance adjustment is not liquidated,

The purpose of the invention is to increase efficiency by reducing drift entrainment, achieved by the fact that a cooler containing a tower with a quadrilateral cross-section, air inlets placed in the lower part of its lateral surface and provided with longitudinal upper and lower inclinations inside the tower opposite windows set to

In the tower 5, a vertical partition dividing the tower into sections is additionally equipped with additional vertical shields installed in the windows with a horizontal canopy installed above

0 by a partition, the latter is made by a U-shaped section, the upper window shields are located inside the tower, and the collector is made. sectional.

FIG. 1 shows an ejection chiller scheme; in fig. 2 is a cross-section of one of its sides; in fig. 3, 4 are diagrams of the location of the vertical internal partition depending on the ratio of the lengths of the cooler sides.

Ejection cooler contains

0 heated water pipeline 1 and the collector section 3 connected through the valves 2. The nozzles 4 are installed on the collector. Walls 5 form a cooler tower, in the lower part of which there is a container b

5 chilled water. Throughout the parameter, walls 5 have an air inlet 7, the lower part of which forms an inclined longitudinal shield 8, and the upper part - a shield 9. The shield 8 is installed on the outer side of the walls 5, and

0 shield 9 - from the inside. Windows 7 are divided by vertical square partitions 10 into sections. Inside the cooler, a vertical X-shaped partition 11 is installed, ending at the top of the burner.

5 zippered visor 12.

Ejection cooler works as follows.

Heated water, sawn a large number of nozzles 4, provides

0 intensive ejection (the volume ejection coefficient reaches 2000) of air from the atmosphere through the air inlet window 7. The lower horizontal shield 8 collects that part of the liquid that is lost by the nozzle from under the threaded connections (a violation of the torch geometry and its ejection to the side is partial clogging of the nozzle insert). The liquid from the shield flows into the tank 6 due to the small

slope (1-2 &) shield 9 inside the cooler. The upper longitudinal shield 9 does not allow the ejected air to slip along the vertical wall 5, mines the working area of the cooler. The width I of shield 9 will depend on the root angle of the fluid torch, 5xtg (/ / 2) .p, where fl is the root angle of the torch, h is the height of the window. Vertical shields 10 form vestibules that form air flows from the periphery to the center and from the bottom up. They eliminate blowing spray strong gusts of wind. Reliable operation of the shields will be provided with a width equal to the height of the window and with a distance L between them.

The specified capacity (in terms of heat, and hence in fluid) of contact coolers can vary greatly depending on the season, time of day, and performance of production workshops. In order to provide a wide range of performance control, the chiller is designed as a decentralized system consisting of several local chillers (sections). For this, water collectors are made sectionally (according to the number of working sides) and each of them can be switched on to work with the corresponding valve 2. Inside the cooler, partitions 11 are inserted, separating the working area of the cooler and eliminating the possibility of ejection of ejected air of the working section through idle windows. The partition, in addition, does not allow the strong wind to blow the sprayed liquid through the windows. The location of the partitions 11 (Fig. 3, 4) is determined by the number of working sides and the ratio of the length and width of the cooler. They should be installed in such a way that the ratio of the cross-sectional area (S) to the length of the collector of the individual sections (T & C) (specific flow rate) would be equal to (Si / T S2 / ic). It is assumed here that the nozzles are installed evenly around the perimeter of the cooler. In particular, with a square cooler (Fig. 4), the partitions are installed at 45 ° to either side.

To locate the sections, the height of the partition 5 must not be lower than the upper window 7

Drops of liquid and air ejected by them under the action of kinetic forces are pressed against the vertical partition

0 11 and move along it up the cooler. On their way, a horizontal visor 12 is installed at the top of the partition 11. In this section of the cooler, liquid droplets are separated due to a sharp change in the direction of air flow.

The width of the visor must be at least 1/8 (on each side) of the width of the section K.

The proposed device allows

Claims (1)

0 significantly increase the efficiency of the cooler. The removal of mechanical moisture through the cross section of the apparatus will decrease by 0.08%, and through the side windows by 0.13%. Invention Formula 5 An ejection fluid cooler containing a tower with a quadrilateral cross-section, air inlet windows located in the lower part of its side surface and provided with upper and 0 lower longitudinal panels inclined inside the tower, coolant collectors with spray nozzles, located outside the tower opposite the windows, a vertical partition installed in the tower dividing the tower into sections, characterized in that, in order to increase efficiency by reducing drift, the cooler is equipped additional vertical. 0 shields installed in the windows, a horizontal visor mounted above the partition, the latter is made of an X-shaped cross section, the upper window shields are placed inside the tower, and the collector is made sectional. with $ s igl FIG. four