JPS5813833B2 - Cylindrical multi-fan countercurrent cooling tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cylindrical multi-fan countercurrent forced draft cooling tower that causes less backflow of humid and warm air into the tower than conventional non-circular countercurrent cooling towers. It is related to.

It is known that square forced draft multi-fan cooling towers become less efficient when strong winds are blowing against them.

The hot, humid air that is being exhausted from the fan hood
This is because it tends to blow into low areas along the air intake openings on the leeward side of the tower.

As a result, hot, moist air flows back into the tower, reducing cooling efficiency.

The inventors have found that by creating a counterflow cooling tower with a cylindrical shape instead of the usual rectangular shape, the effect of wind blowing through the cooling tower can be reduced, thereby improving the efficiency of the cooling tower. I discovered that.

Turning to the prior art, U.S. Pat. No. 3,743,257 discloses a circular cross-flow cooling tower with fill packs of various shapes.

U.S. Pat. No. 3,243,166 discloses a circular cross-flow cooling tower.

The inventors are unaware of any prior art showing cylindrical multi-fan counterflow cooling towers.

It is therefore an object of the present invention to provide a cylindrical countercurrent cooling tower with an improved fill pack, spray eliminator and discharge opening configuration.

Another object of the present invention is to provide a cooling tower that is simple in structure, inexpensive to manufacture, and simple and efficient to construct.

In summary, the cylindrical multi-fan countercurrent cooling tower of the present invention comprises a cylindrical cold water container and a cylindrical outer shell spaced apart above the cylindrical cold water container.

A horizontal deck is supported above the shell and a glenum chamber is formed between the deck and the fill pack within the shell.

Water from the distribution device in the glenum chamber above the fill pack is distributed so as to flow down over the fill pack in countercurrent relationship with the air sucked through the fill pack.

Fans on the deck draw air through the space between the cold water container and the shell, through the fill pack and glenum chamber, and expel it as a rising column of hot, humid air.

To explain in detail with reference to the drawings, the cooling tower 10 basically consists of a container 11 and a cylindrical outer shell 12, the upper end of the outer shell is closed with a roof deck 13, and a frame 14 allows the container 1 to be
It is supported away from 1.

A fill pack 19 is placed in the outer shell 12 at a distance above the container 11.
is supported, the water to be cooled is spread from a water distribution device onto the fill pack, and as the water flows down through the fill pack in contact with the upwardly flowing air, some of the water evaporates. The remaining water that continues to flow into the cylindrical cooling vessel 11 is cooled.

The cylindrical shell 12 and the roof deck 13 are both cold water containers 1
It can be made of reinforced concrete with the same diameter as 1.

It will be obvious that other materials could be used, such as prefabricated steel or other suitable materials.

The roof deck 13 may also be made of reinforced concrete in the form of a slab and is supported at its outer periphery on the top of the shell 12 and its central portion on columns 20.

The roof deck 13 is surrounded by a handrail 64 (FIG. 1), forming a fan hole 16, and a hood 18 is placed around the hole 16.
Install.

A fan 17 is supported within this hole 16.

The shoulders at each end of the lower seat 21 of the fill pack 19 are supported on a beam 40 below the deck 13 and the beam 40 is supported on struts 20 and 31 away from the deck 13 to form a glenum chamber 34. are doing.

The fill pack 19 is composed of a lower sheet 21 and an upper sheet 50, the lower sheet 21 having shoulders at both ends to rest on the beam 40, and the upper sheet 50 being perpendicular and at right angles to the lower sheet. It is a supported rectangular sheet.

The upper sheet 50 has a substantially rectangular shape, and is provided with an appropriate spacer 48.
are mutually governed by.

The lower sheet 21 is similarly rectangular and has an elongated opening 45, a groove 44, and a circular hole 43.

The spacer 48 inserted into the circular hole 43 has a large diameter along the surface of the sheet 21, and maintains these sorts at a predetermined interval.

The lower edge of the sheet 21 has corrugations 42 which guide the water and regroup it as it flows downward.

Both sheets 50 and 21 may be made of asbestos board or other suitable material.

The spacer 48 has two round heads connected by an intermediate member, and the thickness of the heads determines the distance between the sheets 21.

Container 11 has a cylindrical wall 55 (FIG. 3) and a bottom 56 which is optionally supported on pedestals.

The frame 14 consists of a column resting on a cylindrical wall 55, on which the cylindrical shell 12 rests.

Spaced posts 20, 31 and 31' rest on the bottom of the container 11.

The central part of the roof deck 13 rests on the upper end of the strut 20, the gutter 23 rests on the upper end of the strut 31', while the beam 40 is supported on the struts 20, 31, 31' and below the gutter 23. separated.

One embodiment of the fill pack is shown in Figures 3.4, 51, 8 and 12-15; other embodiments are shown in Figures 16, 17, 1.
8, 19, 20, and 21.

The embodiments of the fill pack shown in FIGS. 3.4, 5 and 7.8 and the embodiments shown in FIGS. 12-15 differ in that in the latter case the upper sheet 50 is arranged parallel to the sheet 21; Comb 49
is the same except that it is held by

FIG. 11 shows an embodiment in which the gutter 123 is a round pipe instead of an open-top gutter (FIG. 16), and the horizontal pipe 1
30 are connected.

In the case of the closed system shown in Figure 1T, it is possible to pressurize.

Nozzle 146 sprays water onto the fill pack.

In the embodiment of FIG. 18, a soundproofing material 160 (eg, mineral wool or the like) is supported above the hood 118, and a soundproofing material 161 is supported surrounding the space between the container 111 and the shell 112.

In the embodiment of FIGS. 19 and 20, a shield plate 51 is shown, which is inclined at an angle of, for example, 45° to the horizontal, and is received at both ends in the inclined groove 52 of the column 14.

These armor plates prevent falling water droplets from escaping from the cooling tower.

Wind wall 54 is a sheet of rigid material supported between container 11 and fill pack 19.

The walls 54 are arranged radially at circumferentially spaced locations.

These reduce the velocity of the wind blowing through the space between the vessel and the shell, reducing the wind's ability to carry falling water droplets out of the cooling tower.

Partition walls 36 and 38 are supported within the glenum chamber between the fill pack and the deck.

The partition wall 38, which in the illustrated example extends radially, allows the fan or groups of fans to be arced above each other so that hot moist discharge air from the working fan is circulated to the openings of the non-working fans. Other arrangements may also be made to allow for closures to be avoided.

Thus, the partition wall allows the fans to work independently of each other, so that when one fan is working, others can be completely shut off.

This is particularly advantageous when certain climatic conditions prevail, such as when cold weather requires reducing the air flow through the cooling tower to prevent ice formation.

The acoustical materials 160, 161 may be supported on suitable structural members of a type well known to those skilled in the art.

An anti-icing pipe 41 is supported along the circumference just inside the lower edge of the shell 12. , is connected to the gutter 23 by a pipe 53 (see FIG. 19).

Holes are bored in the lower surface of the pipe 47 and spaced apart in the axial direction, and the water released from these holes creates a curtain in front of the space between the outer shell 12 and the container 11, warms the air that enters the curtain, and deposits the water on the film pack. Prevent ice from forming.

FIG. 21 shows the top of the cooling tower excluding the hood, and illustrates how to open the fan opening 116 on the deck 113.

[Brief explanation of the drawing]

FIG. 1 is a side view of a cooling tower according to the present invention, FIG. 2 is a plan view of the same cooling tower with the fan hood removed, FIG. 3 is a partially cutaway end view of the cooling tower of the present invention, and FIG. Figures 5 and 6 are cross-sectional views taken along lines 4, 5, and 6 in Figure 3, respectively (4
, 5 is a partial view), FIG. 7 is a partial sectional view taken along line 7-1 in FIG. 6, and FIG. 8 is an enlarged partial perspective view of a part of the inside of the cooling tower.
Figure 9 is an enlarged cross-sectional view taken along line 9-9 in Figure 8, Figures 10 and 11 are lines 10-10 and 11-11 in Figure 9.
12 is an enlarged side view of the upper sheet of the fill pack; FIG. 13 is a sectional view taken along line 13-13 of FIG. 12; FIG. 14 is an enlarged side view of the lower sheet of the fill pack; 14 is a sectional view taken along the line 15-15, FIG. 16 is a view similar to FIG. 9 showing one embodiment of the water distribution device (open type gutter), and FIG. 17 is a sectional view of another embodiment (closed type gutter). FIG. 18 is a diagram similar to FIG. 16 showing the cooling tower of the present invention equipped with a soundproofing device, and FIG. 19 is a diagram similar to FIG. 20 is a partial elevational view taken in the direction of line 29-29 of FIG. 19, FIG. 21 is a plan view of another embodiment of the cooling tower, and FIG. 22 is an enlarged view of FIG. 15. A partial view, FIG. 23, is an enlarged partial view of another part of FIG. 15. Explanation of main symbols, 11...Cold water container, 12...
...Cylindrical shell, 13...Deck, 14.
... Frame, 16 ... Hole for fan (
opening), 17...Fan, 19...Fill pack, 20...Strut, 21...Lower sheet of fill back, 23, 123... gutter, 3
0,1 30...Horizontal hype, 32...
・Splash plate, 33...Spray eliminator (drift eliminator), 34...
-Glenum chamber, 46,146...nozzle means, 50...upper sheet of fill pack.

Claims (1)

[Scope of Claims] 1. A cylindrical multi-fan type countercurrent forced draft cooling tower, comprising: a cylindrical cold water container; and a cylindrical shape having approximately the same dimensions as the cold water container and whose upper end is closed by a horizontal roof deck. means for spaced apart supporting the cylindrical shell above the cold water container; and means extending from the cold water container to the roof deck for supporting the roof deck at a location inboard of the cylindrical shell. spaced columns and at least five openings (at least four toward the shell and at least one in the center) symmetrically and evenly spaced on the roof deck; a fan supported within each of said openings for extracting air and water vapor; a fan having a diameter substantially equal to the inner diameter of said cylindrical shell, generally cylindrical in shape, and spaced below said roof deck; a fill pack supported by the fill pack; a spray eliminator disposed in the glenum chamber above the fill pack; and a spray eliminator disposed above the fill pack below the spray eliminator for distributing water to be cooled onto the fill pack. and means for evaporating a portion of the water to be cooled through the opening by drawing air between the cold water container and the cylindrical shell and through the fill pack and spray eliminator. the remaining water is cooled by imparting heat to the evaporating water and flows down into a cold water container for use as cold water; the fill pack is supported proximately below the spray eliminator; supported below the roof deck at a distance approximately equal to the diameter of the fan, forming a relatively thin plenum chamber therein, and providing a substantially uniform pressure between the fill pack and the chilled water container. A cylindrical multi-fan countercurrent forced draft cooling tower characterized by forming an almost cylindrical open space containing air so that the air near the bottom of the fill pack has a nearly uniform pressure. 2. A cooling tower as set forth in claim 1,
The water distribution means includes: a plurality of generally rectangular cross-section, open-topped gutters disposed within the plenum chamber and diametrically across the shell, the ends of which are connected to the sides of the gutters; , a cooling tower comprising a horizontal pipe extending substantially perpendicular to the gutter, a number of axially spaced holes drilled in the bottom of the horizontal pipe, and nozzle means connected to each of the holes. 3. A cooling tower as set forth in claim 2, comprising:
Said nozzle means comprises a splash plate supported beneath each hole in the lateral pipe and spaced from the pipe, so that water flowing down from the lateral pipe through the holes is splashed onto the splash plate and sent to the cold water container by means of a fan. The water is almost uniformly distributed in the fill pack by an air flow drawn laterally into the tower from between the shell and the cylindrical shell and upwardly through the fill pack, so that most of the water is on the top of the fill pack. A cooling tower in which water falls and remains in a cold water container while being cooled. 4. A cooling tower as set forth in claim 1,
A cooling tower in which the fill pack consists of a plurality of spaced apart plates arranged in a vertical plane, the plates having corrugations on the lower edges of the plates to help water flowing down the plates collect and flow toward a cold water container.