DE2512397A1 - CROSS-FLOW COOLING SYSTEM - Google Patents

Description

Dipl.-Ing. Dr. jur. Alfred W. Meyer 4 Düsseldorf ι> η _κ /, -,

Patent attorney KrauzstraSe 32 25123 ^Q 7

Teiefon: (Ο21ί> 325964

My sign File number:

: ~ 7oob 43

Hamon-Sobelco Soeiete Anonymous Rue Capouillet, 50-58 - 1060 Brussels / Belgium

Cross-flow cooling system

The invention relates to a cooling system for cooling a liquid by means of a gas and is used in particular for Cooling of industrial wastewater using atmospheric air.

Such systems are often in the form of a tower in which the water in a sprinkler system is in contact with the atmospheric air is brought and thereby cooled. The gas and the liquid can be in these facilities in the area the contact device according to the cross-flow method against each other or better perpendicular to each other. Some

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these cooling systems have samral distributors for water and distribution pipes on, which feed the contact device. One of the goals r.iit strives for such cooling systems is the maximum Heat exchange between the water and the atmospheric air. In order to reduce pressure losses as much as possible, therefore the inlet openings of the atmospheric air are arranged in the immediate vicinity of the contact device. But this can in prostration periods during winter to ice formation at the air inlets to lead. The ice can get caught in the sprinkler system and cause serious material damage. Often the tower cannot be put into operation, which means whole factory units can be paralyzed. Also can it can happen that the ice thus formed breaks the supporting structure of the contact device and the water distribution system leads.

The problem addressed here is particularly with cross-flow contact devices critical, in which the formation of ice not only at the entrance of the device, but also immediately downstream occurs. The flow of cold air cannot heat up sufficiently when it passes over the sprinkler system and therefore leads to the formation of ice in the internal, splashed areas of the contact device.

The object of the invention is the cross-flow cooling systems Zti prevent ice formation and so the resulting Avoid disadvantages.

This task is based on a cooling system for cooling down a liquid by means of a gas, with a tower and one arranged in the outer part of its base and via openings On the one hand with the atmosphere and on the other hand with the interior of the tower, a fluid distribution system

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and a cross-flow contact device having a sprinkler device for the liquid and the gas according to the invention solved in that the liquid distribution system has at least two line circuits arranged at different distances from the tower, of which the one from the tower the most distant line circuit with one, its flow rate when not feeding at least one of the others Line circuits noticeably increasing device is provided.

According to one embodiment of the invention, the distribution system comprises at least two optionally or simultaneously feedable troughs, of which the trough furthest apart from the tower has an outer side wall serving as an overflow, the height of which is smaller than that of the other walls.

According to another embodiment, in the area of the Tower at the most distant part of the contact device an additional line provided with spray nozzles for water is provided, which has a relatively considerable flow rate enables.

In the following, three exemplary embodiments of the invention will be explained in more detail with reference to drawings, namely:

1 shows a cross-section through a first embodiment of a cross-flow control system attached to a tower act device;

FIG. 2 shows a plan view of the contact device according to FIG. 1;

5 shows a cross section through a second embodiment of a cross-flow contact device attached to a tower;

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FIG. 4 shows a plan view of the contact device according to FIG. 3i

Figures 5 and 6 show a third embodiment of a cross-current contact contraption .

1 and 2, a cooling system with one of a conventional cross-flow sprinkler 2 is surrounded Tower 1 shown.

One at a short distance from the cooling or sprinkling device 2 blinds arranged around this form an air inlet 3.

A water supply line 4 distributes water in parallel to several line circuits formed by outer troughs 5 and 6, middle troughs 7 and 8 and inner troughs 9 and 10 on the side of tower 1. The troughs 5t 7 and 9 extend parallel to each other above the sprinkling device 2 along one half of the circumference of the tower 1. In addition, the side wall 11 of the outer troughs 5 and 6 in the area of the air inlet 3 is lower than the other walls 12 that make up the individual troughs separate from each other. Closure devices I3 designed as slides, for example, make it easier to open and close the troughs to be fed from the water supply line 4.

In periods of frost, these devices are used to partially or completely block those troughs which feed those steps of the sprinkling device 2 furthest away from the air inlet. In this way, the other parts of the sprinkler 2 are charged more. When the locking devices 13 of the inner trough

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9 and 10 and the middle troughs 7 and 8 partially closed, are, the flow rate of the outer troughs 5 and 6 increases, leading to a concentration of hot water in the the air inlet 3 adjacent part of the Berleselungseinriehtung 2 leads. This concentration of hot water causes the temperature to rise, which prevents ice formation.

If troughs 7, 8, 9 and 10 are completely blocked, then provided that the troughs 5 and 6 via the water supply line 4 Sufficient water is supplied, the water over the side wall 11 and sprinkles the blinds of the air inlet 3. The flow forms a screen that shows the pressure drop and the air temperature elevated. At the level of the sprinkling surfaces, the air heated again in this way cannot cool so much, that ice can form. The overflow of the water the outer trough 5 and 6 also has the advantage that the struts and blinds of the air inlet 3, which may also be iced up, are also flooded.

The system also has the advantage that a quantity of water can be cooled regardless of the number of troughs fed can.

In FIGS. 3 and K , a second embodiment of a cross-flow contact device consisting of two units arranged symmetrically to one another around a tower 14 is shown.

Each unit has two feeding troughs 15 and 16 which are positioned side by side above a direction of irrigation ice 1? are arranged and are in turn fed in series by a water supply line 18. Me troughs 15 and 16 are connected to one another via slides or flaps 19. In the bottom of the trough 15 vn & 16 there are nozzles which the water above the

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Distribute sprinkler line 17.

When the system is in operation, the slides 19 are raised, which means the entire irrigation system 17 is fed.

At low temperatures all slides 19 are down, so that only the outer trough 15 is fed. To this Way is, according to the embodiment explained above, The hot water is concentrated in the area of an air inlet 22 and the temperature in this area is increased.

Another Äusfünrungsbeispiel such a cooling system 5 and 6 show the troughs are through one out of the Wasserzafti & rungsleitung 18 replaces the fed pipe network 20, which distributes the water over the sprinkling device 17. In addition, a line 21 is above the air inlet 22 arranged, whose QuersehnüLfet is larger than the cross section of the tubes of the pipe network 20. KLe line 21 is taken out of the water supply line directly via an interconnected valve 25 l8 fed! it is provided with spray nozzles, from which the water can run through the air inlet 22.

As in the case of feeding via troughs, the closing devices also allow the water to be distributed only to the areas of the sprinkling device that are adjacent to the air inlet 22.

At very low temperatures, the feed valve can also be used the outer pipe to be opened, bringing hot water is passed over the Ijofteiiitritt 22. That way The protection against ice achieved corresponds to the upper reaches of the outermost trough as explained in the first example.

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Claims (8)

Patent claims IJ - Cooling system for cooling a liquid by means of a gas, with a tower and a cross-flow contact device for the liquid, which is arranged in the outer part of its base and connected via openings on the one hand to the atmosphere and on the other hand to the interior of the tower, a liquid distribution system and a sprinkling device and the gas, characterized in that the liquid distribution system (4, 5 to 10; 15, 16, 18; 20, 21) has at least two line circuits (5 to 10; 15, 16; 20, 21), of which the line circuit (5, 6; 15; 21) furthest apart from the tower (1) is provided with a device (13; 19; 23) which noticeably increases its flow rate when at least one of the other line circuits is not fed. 2. 'Cooling system according to claim 1, characterized in that each line circuit is at least one for Regulation of the flow rate with a closure device (13; 19), preferably a slide, provided trough (5 to 10; 15, 16). 3. Cooling system according to claim 2, characterized in that the troughs (5 to 10) are fed in parallel from a water supply line (4). 4. Cooling system according to claim 2, characterized in that the trough (15 * 16) is fed in series are, the trough (15) furthest apart from the tower (1) is fed first and in turn the second trough (16) feeds. 509840/0381 - 8 - 5. Cooling system according to one of claims 2 or J5, characterized in that the tower (1) the most distant troughs (5, 6) in the area of the opening connecting the contact device (2) to the atmosphere (3) an external side wall (11) serving as an overflow has, the height of which is smaller than that of the other walls (12). 6. Cooling system according to claim 1, characterized in that each line circuit fed by parallel and pipes (20) provided with closure devices for regulating the flow rates. 7. Cooling system according to claim 6, characterized in that the liquid distribution system in the area the opening (22) connecting the contact device to the atmosphere, an additional one with spray nozzles for the Has fluid-provided conduit (21) which allows relatively substantial flow rates on the side of this opening. 8. Cooling system according to one of claims 1 to 7 with one in the opening, which the contact device (I7) with connecting the atmosphere, arranged blind, characterized in that at least part of an additional The flow rate is passed through the blind. 509840/0381 Blank page