JPH0619985Y2 - Cross flow type cooling tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cooling tower for cooling heat source water or industrial wastewater for air conditioning equipment.

(Prior Art) Conventionally, in this type of cooling tower, a cross-flow type cooling tower in which treated water is vertically flowed vertically from top to bottom to flow cooling air horizontally is already known. Is.

(Problems to be Solved by the Invention) In order to increase the operation efficiency of the above-mentioned conventional cross-flow cooling tower, it is necessary to increase the size of the packing layer and to use a blower or the like having a large capacity. As a result, the facility and the area occupied by it become enormous, and the number of maintenance management tasks associated therewith must be increased, and also when multiple small cooling towers are installed side by side, the area occupied by that facility also increases. Was inevitable.

On the other hand, if the one with insufficient treatment capacity is used, the temperature of the cooling water is still high and post-treatment cannot be performed, and white smoke is generated from the exhaust port in the winter season.

Also, by introducing the outside air by heating and mixing it with moist air,
Although there was something that could prevent the generation of white smoke, its effect was not sufficient, and in addition to increasing the loss of the blower and pump, in the winter, dew condensation occurred and the inner wall of the exhaust duct was damaged, etc. There were many problems.

(Means for Solving the Problems) In view of the above, the present invention has two sets of cooling devices of a relatively small type arranged vertically to improve the operation efficiency and reduce the area occupied by the facility, and further improve the season. It is a cross-flow type cooling tower that is convenient to use and is designed to prevent white smoke during use in winter. Cooling device A, B comprising a fresh air inlet, a packing layer located inside the inner chamber, an eliminator, a blower, a sprinkler pipe provided above the packing layer, and a water tank further provided on the lower surface of the packing layer. And the upper and lower air blowers are divided into air passages common to the upper and lower blowers, and a heating coil that conducts the treated hot water is provided between the eliminator and the blower in the lower cooling device to heat the treated hot water. Upper stage cooling device via coil A switching valve is provided which can be switched between a state of supplying the sprinkler pipe A and a state of supplying the treated hot water to the sprinkler pipes of the upper and lower two cooling devices A and B without passing through the heating coil. To do.

(Operation) In the cooling tower according to the present invention, by switching the switching valve (13), the treated hot water is caused to flow down to the packing layers (3) and (3) of the upper and lower cooling devices A and B during the operation in the summer and the intermediate period. Each entrance (2) (2)
A heating coil that performs wet cooling by orthogonal contact with the outside air from the outside and treats hot water in the lower cooling device B in winter.
By spraying water to the packing layer (3) of the upper cooling device A through (9), wet cooling is performed in the upper cooling device A by contact with the outside air introduced, but in the lower cooling device B, the heating coil (9) And the outside air are heated to heat the introduced outside air to dry-cool the treated hot water, so that in the exhaust passage (8), supersaturated air from the upper cooling device A is heated to unsaturated unsaturated air from the lower cooling device B. It is possible to prevent white smoke because it is mixed with and discharged from the exhaust passage (8), and it is possible to increase the operating rate by using the cooling devices A and B arranged in two stages, upper and lower depending on the season. Further, two cooling towers of the present invention may be installed so as to face each other as shown in FIG. 4, or a plurality of cooling towers may be arranged side by side in a row as shown in FIG. 5 to further increase the operation rate.

Furthermore, by switching the switching valve (13) in the winter so that the treated hot water is passed from the heating coil (9) arranged in the lower stage to the packing layer arranged in the upper stage, wet air and dry air can be obtained. Not only can prevent the generation of white smoke by mixing, but also the dry light air heated by the heating coil (9) arranged in the lower stage is exhausted to the lower stage of the exhaust passage (8) and exhausted in the upper stage section. Since the humidified heavy air is blown up through the filled packing layer, the wet air and the dry air are well mixed and no white smoke is generated at the exhaust port. Moreover, even in the winter when dew condensation is likely to occur, the moist air does not stagnate at the bottom of the exhaust duct (8) and damage the inner wall of the exhaust duct.

Since the treated hot water that has passed through the heating coil (9) is always cooled again through the filling layer, the treated hot water after cooling does not remain at a high temperature, and one small capacity heating coil is provided. It's enough.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3, the present invention equips the compartments in the outer wall (1) divided into upper and lower chambers with orthogonal cooling devices.

In the cooling devices A and B arranged in the two stages, the outside air inlet (2) is opened on one side of the outer wall (1), respectively, and the packing layer (3) and the eliminator (4) are provided in the inner chamber. And a blower (5) are arranged side by side, a sprinkler pipe (6) is further provided on the packing layer (3), and a water tank (7) is formed on the lower surface.

On the opposite side of the outside air inlet (2) of the outer wall (1), an exhaust passage (8) common to the upper and lower two-stage exhausters (5) and (5) is formed, and a muffling cell or muffling is provided in the inner passage. A noise suppressing member (10) such as a slit was installed to prevent noise.

Eliminator (4) and blower (5) in the lower cooling unit B
A heating coil (9) was provided between the heating coil and the heating coil. In the example shown in the figure, two blowers (5) in the upper and lower stages are installed side by side to prevent an imbalance in the air distribution due to one unit, but the number can be increased or decreased arbitrarily, and as shown in FIG. The cooling devices A and B provided in Fig. 2 show the case where three units are horizontally arranged in parallel and are installed vertically, but the number of units used is arbitrarily increased or decreased according to the operating capacity. You can

The supply of the treated hot water to the cooling devices A and B installed in the above two stages is provided with the switching valve (13) in the supply pipe line (12) connected to the pump (11).
Is provided by switching the valve (13).

That is, during the summer and intermediate season operations shown in FIG. 1, if the passage opening to the heating coil (9) side is closed and used, the treated hot water will flow from the pipeline (12) to the two upper and lower packing layers (3). Sprinkler (6)
The upper and lower cooling devices A and B are sprinkled from both sides to perform a wet cooling operation, and in the winter, the switching valve (13) is switched so that the pipe line (12) communicates with the heating coil (9) side. As shown in FIG. 2, after passing through the heating coil (9), water is sprayed from the water sprinkling pipe (6) of the upper cooling device A to the packing layer (3), so that the upper cooling device A performs the wet cooling action and the lower cooling device. The device B has a dry cooling function.

In addition, the packing layer (3) uses a water film type with high thermal performance and low static pressure, and the blower (5) uses a multi-blade type or an axial blower to reduce noise during operation. Things are desirable.

(Effects of the Invention) According to the present invention, although the operating capacity is increased by installing the cooling device by dividing the outer wall into upper and lower two stages,
The equipment occupies a small area, so the rooftop installation conditions for the building are good.

Moreover, in the winter, the hot water is supplied to the heating coil by operating the switching valve, and the outside air is heated and dried by the heating coil and introduced into the exhaust passage to mix with the moist air passing through the packing layer. As a result, no white smoke is produced from the exhaust port. Furthermore,
Since the packing layer is provided in the upper stage and the heating coil is provided in the lower stage, the dry light air blows up the moist heavy air in the exhaust passage, which improves the dry light air and the moist heavy air. It is mixed to make the exhaust air more secure against white smoke.

Further, this prevents the moist air from stagnation in the lower part of the exhaust passage and damaging the inner wall of the exhaust passage even in winter when dew condensation is likely to occur.

Further, since the treated hot water once cooled by the heating coil is cooled again by the filling layer, it is sufficient to provide one heating coil having a small capacity, which is advantageous in terms of cost.

On the other hand, in the summer when white smoke does not occur at the exhaust port, the supply of the treated hot water to the heating coil can be stopped by switching the selector valve, which can reduce the pressure loss of the treated hot water. It is possible to prevent an increase in loss.

[Brief description of drawings]

FIG. 1 is a cutaway side view showing a cooling tower according to an embodiment of the present invention in a summer operation state, FIG. 2 is a cutaway side view showing a winter operation state, FIG. 3 is a cutaway plan view, FIG. 4 and FIG. [Fig. 3] is a plan view showing a usage example. (1) …… Outer wall, (2) …… Outside air inlet (3) …… Packing layer, (4) …… Eliminator (5) …… Blower, (6) …… Sprinkler pipe (7) …… Water tank , (8) ...... Exhaust passage (9) ...... Heating coil, (13) ...... Switching valve A, B ...... Cooling device

Claims (1)

[Scope of utility model registration request] 1. An outer air inlet (2) opened on a side wall of each of the compartments of an outer wall (1) divided into upper and lower layers, a packing layer (3) located inside the inner chamber, and an eliminator (). 4) and blower
A cooling device A comprising (5), a sprinkler pipe (6) provided above the packing layer (3), and a water tank (7) further provided on the lower surface of the packing layer (3),
B is arranged in the upper and lower two stages, and the common exhaust path (8) is formed in the upper and lower blowers (5), and the treated hot water is provided between the eliminator (4) and the blower (5) in the lower cooling device. A heating coil (9) for conducting the above is provided, and the treated hot water is supplied to the sprinkler pipe (6) of the upper cooling device A through the heating coil (9) and the treated hot water does not pass through the heating coil (9). A cross-flow type cooling tower provided with a switching valve (13) which can be switched between a state where it is supplied to the sprinkler pipes (6) of the upper and lower cooling devices A and B.