JP2903066B2 - Crossflow cooling tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-flow cooling tower, and more particularly to a cross-flow cooling tower in which a filler is stacked in multiple stages and filled in a main body.

<Conventional technology> As this type of cross-flow cooling tower, for example,
There is 13276 publication.

<Problems to be Solved by the Invention> In a conventional rectangular cross-flow type cooling tower, the spray water is sprinkled from the upper spray tank of the cooling tower into the filler of the cooling tower, and dropped.
The outside air is sucked from the outside air inlet through the inside of the filler at the fan. For this reason, the spray water in the filling material is flooded by the sucked air flow, and the spray water that falls as it reaches the lower portion of the filler material is drawn to the cooling tower exhaust port side, that is, the center of the cooling tower, and the lower part of the filling material No heat exchange takes place in the outer part of the material. This means that the surface area of the packing material is not sufficiently utilized for heat exchange, and it is necessary to increase the cooling tower volume accordingly.

An object of the present invention is to improve the heat exchange rate by preventing the spray water dropped in the filler from being sucked toward the exhaust port so that the spray state is uniform throughout the filler. To provide a market cooling tower.

B. Configuration of the Invention <Means for Solving the Problems> In order to solve the above problems, a cross-flow type cooling tower of the present invention has a plurality of sheets filled in a main body of the cooling tower facing an outside air intake of the cooling tower. The plate material is completely overlapped in the vertical direction and is filled in at least two stages, and a spraying water distribution plate that allows water to flow freely is arranged between the uppermost filler and the upper and lower fillers, and the filler and The spray water distribution plate is arranged such that the outside air intake side is entirely inclined lower than the exhaust port side of the cooling tower,
The filler is an indirect heat exchanger comprising a heat exchange coil with a fin, and the fin is a corrugated plate formed by forming ridges inclined downward to the outside air intake side at a predetermined pitch and in parallel with each other. Features.

<Operation> The operation of the cross-flow cooling tower of the present invention configured as described above will be described below.

Like a normal cross-flow cooling tower, the blower operates to suck outside air from the outside air intake into the cooling tower, and horizontally moves the air passage between the indirect heat exchangers, which are a type of the filler filled in the cooling tower. To the cooling tower exhaust port side.

On the other hand, the spray water from the upper water tank of the cooling tower falls sequentially on each indirect heat exchanger orthogonally to the air flow, and during this fall, it is directly contacted with the air flow to be cooled by the latent heat action, Indirect cooling of the industrial process fluid coming into each indirect heat exchanger from the load via a common feed head.

The cooled industrial process fluid is supplied from the heat exchanger to the load via a common discharge side header,
After the temperature is raised, the heat is resupplied to these heat exchangers again and repeatedly cooled.

In the present invention, before falling from the upper water tank to the uppermost indirect heat exchanger, it falls on the spraying water distribution plate, and after being temporarily retained by this distribution plate, the spraying water distribution plate uniformly returns. It is distributed and redistributed, and is uniformly distributed to the next heat exchanger.

At this time, since the outside air intake side of the heat exchanger and the spray water distribution plate is arranged in the cooling tower at a lower angle than the exhaust side, the spray water is blown by the outside air inlet by the force and the inclination. The spraying water is evenly distributed and spread over the entire surface of each heat exchanger, and the spraying water flows down in a substantially vertical direction.

Since the fin in the indirect heat exchanger is formed of the corrugated plate having the ridges, the spray water is more forcibly sprayed to the heat exchanger on the side of the outside air intake, and the contact area with the air flow is increased. Water droplets scattered in the air flow strike the fin and are trapped.

<Example> Next, a typical example of the present invention will be described.

In FIG. 1, reference numeral A denotes a closed type cross-flow cooling tower, and an indirect heat exchanger 13 which is a kind of a filler composed of a heat exchange coil 12 with a fin 11 facing an outside air intake B thereof.
However, at least two stages are arranged vertically and four stages are shown in FIG.

The fins 11 of the heat exchangers 13 are formed of corrugated sheets having ridges 15 inclined downward at a predetermined pitch toward the outside air inlet B at a predetermined pitch (see FIG. 3).

A spray water distribution plate 16 made of a punch plate made of a synthetic resin such as vinyl chloride is provided between the upper and lower indirect heat exchangers 13.
Is interposed. Further, a similar spray water distribution plate 16 is disposed between the upper water tank C of the cooling tower A and the uppermost indirect heat exchanger.

The spray water distribution plate 16 is located between the upper and lower indirect heat exchangers 13 and the spray water distribution plate 16 is
11 It is also used as a shelf to support the lower end.

The punch plate constituting the spray water distribution plate 16 includes:
As shown in FIG. 2, a large number of water spray holes 17 are provided, and the distribution state of the water spray holes 17 is large (dense) on the side of the outside air intake B.
The cooling tower A is provided with a small amount on the exhaust port D side where the blower E is attached (see FIG. 2).

The indirect heat exchanger 13 and the spray water distribution plate 16 stacked in multiple stages as described above are entirely inclined in such a position that the outside air intake B side is lower than the exhaust port D side, and the inside of the cooling tower body 14 is inclined. Are arranged.

Reference numeral 18 denotes a supply-side header connected to the supply ports of the heat exchanger 13, and reference numeral 19 denotes a discharge-side header connected to the discharge ports.

The operation of the cross-flow cooling tower A of the embodiment configured as described above is the same as the operation of the present invention, and the description thereof will be omitted.

C. Effect of the Invention In the cross-flow cooling tower of the present invention configured and operated as described above, the filler and the whole spray water distribution plate are inclined and cooled in a state where the outside air intake side is lower than the exhaust port side. Because it is packed in the tower body, spray water can be evenly sprayed on the packing material of each stage, and there is no dead space where spray water is not sprayed at all on the outside air intake side as in the past,
The entire surface of the filler can be sufficiently utilized for heat exchange of spray water and circulating water, and sufficient heat exchange efficiency can be achieved without increasing the capacity of the cooling tower.

Since the filler is an indirect heat exchanger comprising a finned heat exchange coil, the circulating cooling water flowing through the indirect heat exchanger is sprayed down along the outer surface of each stage of the heat exchanger by spray water. The entire surface can be cooled indirectly and efficiently.

Since the fin is a corrugated plate formed by forming ridges downwardly inclined toward the outside air intake side at a predetermined pitch, the surface area of the fin can be increased, and spray water flowing down on the fin and air flowing horizontally are formed. The amount of heat exchange with the flow can be increased, and the spray water can be contacted to the outside air inlet side along the inclined ridge to flow down, thereby reducing the dead space in which the spray water is not sprayed on the filler.

<Effects Specific to the Embodiment> The above-described embodiment has the same effects as the present invention. In addition, since the spray water distribution plate 16 is made of a synthetic resin such as vinyl chloride, the metal fins 11 are prevented from being electrically corroded. Can be prevented.

[Brief description of the drawings]

1 is a schematic view of a typical embodiment of the present invention, FIG. 2 is a plan view of a spray water distribution plate, and FIG. 3 is a view partially showing the heat exchanger. It is a front view. Description of main symbols in the figure 12: Indirect heat exchanger 16: Sprinkling water distribution plate

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F28C 1/00-1/16 F28F 25/00-25/12

Claims (1)

(57) [Claims] 1. A cooling tower body, wherein at least two packing plates are filled with a plurality of filling plate members facing the outside air intake of the cooling tower so as to be completely overlapped in the vertical direction, and the uppermost packing member is provided. A spray water distribution plate that allows water to flow freely is disposed between the upper and lower fillers, and the filler and the spray water distribution plate are arranged such that the outside air intake side is entirely inclined lower than the exhaust port side of the cooling tower. The filler is arranged as an indirect heat exchanger comprising a heat exchange coil with fins, and the fins are corrugated plates formed with ridges inclined downward toward the outside air intake side at a predetermined pitch and in parallel with each other. A cross-flow cooling tower, characterized in that: