JP2006226660A - Single suction type cross flow compact cooling tower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the piping of a sprayed water system and the piping of a circulated-cooling water system, and to make maintenance easy by mounting a pack plate and a closed heat exchanger separately from each other at different places in a compact cooling tower. <P>SOLUTION: A sprayed water piping system A is mounted so that the water is sprayed to a pack plate 12 from an upper water tank 11, and the sprayed water flowing down as a thin film is brought into contact with the airflow flowing from an outside air intake port 13 toward an air discharge port 14 in a cross flow state, cooled by latent heat by the vaporization of sprayed water, collected in a concave water tank 15, pumped up by a pump and returned to the upper water tank 11 to be recycled. The plate type closed heat exchanger 16 is mounted in an open space at a lower portion of the air discharge port 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a single suction type cross flow type small cooling tower.

In the case of the cross flow type cooling tower, by operating the blower, the outside air is sucked from the outside air intake port provided on the side surface in which the cross flow packing plate and the heat exchange coil are hierarchically arranged, and this air and the upper water tank The sprayed water sprayed on the crossflow filling plate is contacted in a substantially orthogonal direction to exchange heat, and the circulating cooling water flowing in the heat exchange coil with the cooled sprayed water is indirectly cooled, Sprinkling water is dropped into the water tank, returned to the watering device, and recycled. Further, the circulating cooling water flowing in the heat exchange coil is supplied to the load portion as cold water, and after cooling the refrigerant in the load portion indirectly, it is returned to the heat exchange coil.
Japanese Patent Laid-Open No. 2005-9750

  In the conventional example, since the crossflow filling plates and the heat exchange coils are arranged in a hierarchy, the piping is complicated and requires time for maintenance.

The main object of the present invention is to simplify the piping and facilitate the maintenance by adopting a single suction type and improving the arrangement of the crossflow filling plate and the sealed heat exchanger.
Another object of the present invention is to prevent contamination during use of circulating cooling water by indirectly cooling the circulating cooling water without directly contacting the outside air.
Another object of the present invention is to facilitate prevention of freezing of the hermetic heat exchanger in winter.
Another object of the present invention is to make it possible to easily change and replace the capacity of the hermetic heat exchanger.
A further object is to easily vent the circulating cooling water and prevent the pipe from being damaged due to freezing due to poor drainage.

In order to solve the above problems, the present invention is a single-suction type, cross-flow type small cooling tower,
Below the sprinkler, a plurality of packed plates are arranged at intervals in the width direction of the outside air intake port, as an open heat exchanger,
The sprayed water sprayed from the sprinkler on the filling plate and flows down as a thin film is brought into contact with the airflow flowing from the outside air intake port to the exhaust port in a cross-flow manner, cooled by the latent heat of vaporization of the sprayed water, and dropped. After collecting in the water tank, it is pumped up by a pump, returned to the watering device, and a spray water piping system to be reused is arranged.
In the open space below the exhaust port, a plate type or pipe type sealed heat exchanger is arranged,
In this hermetic heat exchanger, a large number of the circulating cooling water flow path and the spray water flow path are arranged in parallel vertically in a form of indirect contact, and this hermetic heat exchanger as a whole is a block body,
A circulating cooling water inlet and a circulating cooling water outlet are provided in the block body so that the circulating cooling water flows in the circulating cooling water flow path connected to the load portion,
The spray water flowing through the spray water flow path is dropped and the spray water inlet and the spray water outlet are provided in the block body so as to flow from the water tank side to the water spray device side,
A supply pipe for supplying cold water, which is obtained by indirectly cooling the circulating cooling water flowing through the circulating cooling water flow path using the sprayed water flowing through the spraying water flow path, to the load portion is connected to the circulating cooling water outlet. It is a single-suction type, cross-flow type small cooling tower.

  As described above, in the invention described in each claim of the present invention, a plate-type or pipe-type sealed heat exchanger is arranged in the open space below the exhaust port, and in this sealed heat exchanger Are arranged in parallel so that the circulating cooling water flow path and the spray water flow path are in indirect contact with each other, and this hermetic heat exchanger as a whole is a block body, and the inside of the circulating cooling water flow path connected to the load section A circulating cooling water inlet and a circulating cooling water outlet are provided in the block body so that the circulating cooling water flows. In addition, since the spray water outlet is provided in the block body, the filling plate and the hermetic heat exchanger are arranged separately in separate locations in the small cooling tower, and the spray water piping and circulation cooling are arranged. Simplify water piping , It can facilitate maintenance.

Since the whole of the sealed heat exchanger is a block body, the capability of the sealed heat exchanger can be easily changed by exchanging the entire block body. Furthermore, the old and new sealed heat exchangers can be easily replaced.
The hermetic heat exchanger is a plate-type hermetic heat exchanger, and a large number of these are arranged in parallel so that the circulating cooling water flow path plate and the spray water flow path plate are in contact with each other. Since the periphery of the sealed heat exchanger made of a plate is completely brazed and the whole is formed as one block body, the sealed heat exchanger can be replaced more easily.
In the case where the circulating cooling water inlet and the circulating cooling water outlet are provided in the block body so that the circulating cooling water flowing through the circulating cooling water flow path connected to the load part flows down from the top, for example, the circulating cooling water Water can be easily vented, and pipe breakage due to freezing due to poor drainage can be prevented.
Moreover, freezing of the sealed heat exchanger in the winter can be easily prevented by appropriately covering the sealed heat exchanger with a heat insulating material.
Since the pipeline that blocks the sprayed water to the filling plate and returns to the dropped water tank can be selectively communicated to the sprayed water outlet side in the sealed heat exchanger, the sprayed water to the filling plate in the winter season Stops sprinkling, prevents freezing in the spray water piping system, circulates on the shot circuit between the dropped water tank and the sealed heat exchanger pipe, and maintains a predetermined temperature with a heater in the dropped water tank The sprayed water thus supplied is supplied to the hermetic heat exchanger to prevent the circulating cooling water channel from freezing.

Embodiment This embodiment is a typical embodiment of the invention described in claims 1 to 8.
In FIG. 1, reference numeral 10 denotes an entire single suction type and cross flow type small cooling tower, and a packing plate is provided below an upper water tank 11 which is a kind of watering device in the single suction type and cross flow type small cooling tower 10. A plurality of pieces 12 are arranged at intervals in the width direction of the outside air intake port 13 arranged on one side to form an open heat exchanger.
The sprayed water sprayed from the upper water tank 11 on the filling plate 12 and flowing down as a thin film is brought into contact with the air flow flowing from the outside air intake port 13 toward the exhaust port 14 in a cross-flow manner to vaporize the sprayed water. A sprayed water piping system A is disposed which is cooled from latent heat, collected in the dropping water tank 15, pumped up by the pump P, returned to the upper water tank 11, and reused.

A plate-type sealed heat exchanger 16 is disposed in the open space below the exhaust port 14. The sealed heat exchanger 16 includes a plate for the circulating cooling water flow path 17 and a spray water flow path 18. A plurality of plates are arranged in parallel so as to be in contact with each other, and the periphery of the hermetic heat exchanger 16 composed of these stacked plates is completely brazed, and the whole is formed as one block body B.
A circulating cooling water inlet 19 and a circulating cooling water outlet 20 are provided in the block body B so that the circulating cooling water flowing in the circulating cooling water flow path 17 connected to a load portion (not shown) flows down from above. A spray water inlet 21 and a spray water outlet 22 are provided in the block body B so that the spray water flowing in the spray water channel 18 flows upward from the dropped water tank 15 side to the upper water tank 11 side (FIG. 2). reference).
A supply pipe 23 for supplying cold water obtained by indirectly cooling the circulating cooling water flowing through the circulating cooling water channel 17 with the sprayed water flowing through the spraying water channel 18 to the load section (not shown) is connected to the circulating cooling water outlet 20. Communicate. That is, the closed heat exchanger 16 is a liquid indirect contact heat exchanger.
The sealed heat exchanger 16 is the same as the present invention even if a pipe-type heat exchanger 16 is arranged as shown in FIG.
As the pipe-type hermetic heat exchanger, a plurality of pipes for circulating cooling water flow paths are provided in a box, and the sprayed water flows in a counterflow around the plurality of pipes in the box, The whole is a single block.

The spray water piping system A is piped in the small cooling tower 10. The sealed heat exchanger 16 is in the small space on the opposite side to the outside air intake port 13 in an open space below the exhaust port 14. Arrangement on the inner wall surface side of the tower 10 of the tower 10 is preferable from the viewpoint of the use of the corridor without inhibiting the sucked air flow. The sealed exchanger 16 is entirely replaceable as a block body B. Or it fixes to a regular place at the time of installation, and it can connect with a load part similarly. The cooling tonnage of the small cooling tower 10 is 100 cooling tons or less.
The load section (not shown) is an air conditioner, a cooling device, a storage / preservation device, or other equipment that requires cooling.
The air conditioner communicates with one of an air conditioner and a fan coil unit through a heat exchanger.
A circulating cooling water supply pipe 24 from the load section (not shown) to the sealed heat exchanger 16 and a circulating cooling water return pipe from the sealed heat exchanger 16 to the load section (not shown). It is preferable that the certain supply pipe 23 is drawn out of the small cooling tower 10 through the dropping water tank 15 of the small cooling tower 10. C denotes an air vent valve provided at the top of the circulating cooling water supply pipe 24.
The circulating cooling water supply pipe 24 from the load section (not shown) to the sealed heat exchanger 16 and the circulating cooling water return from the sealed heat exchanger 16 to the load section (not shown). The supply pipe 23, which is a pipe, may be drawn out of the cooling tower through the outer plate of the small cooling tower 10.

  The hermetic heat exchanger 16 has a structure in which a peripheral surface thereof is covered with a heat insulating material 25 to prevent freezing. Further, a pipeline 26 that shuts off the sprayed water to the filling plate 12 and returns it to the dropped water tank 15 can be selectively communicated to the sprayed water outlet 22 side of the sealed heat exchanger 16 by a switching valve 27 to prevent freezing. As a structure.

1 is a schematic side view of a first embodiment. FIG. 2 is an exploded perspective view of the plate-type sealed heat exchanger of FIG. It is a perspective view which shows the block body of the sealed type heat exchanger of FIG. FIG. 4 is a perspective view of a tube-type sealed heat exchanger having a structure different from that in FIG. 3.

Explanation of symbols

10 Small cooling tower 16 Sealed heat exchanger

Claims (8)

In a single-suction and cross-flow small cooling tower,
Below the sprinkler, a plurality of packed plates are arranged at intervals in the width direction of the outside air intake port, as an open heat exchanger,
The sprayed water sprayed from the sprinkler on the filling plate and flows down as a thin film is brought into contact with the airflow flowing from the outside air intake port to the exhaust port in a cross-flow manner, cooled by the latent heat of vaporization of the sprayed water, and dropped. After collecting in the water tank, it is pumped up by a pump, returned to the watering device, and a spray water piping system to be reused is arranged.
In the open space below the exhaust port, a plate type or pipe type sealed heat exchanger is arranged,
In this hermetic heat exchanger, a large number of the circulating cooling water flow path and the spray water flow path are arranged in parallel vertically in a form of indirect contact, and this hermetic heat exchanger as a whole is a block body,
A circulating cooling water inlet and a circulating cooling water outlet are provided in the block body so that the circulating cooling water flows in the circulating cooling water flow path connected to the load portion,
The spray water flowing through the spray water flow path is dropped and the spray water inlet and the spray water outlet are provided in the block body so as to flow from the water tank side to the water spray device side,
A supply pipe for supplying cold water, which is produced by indirectly cooling the circulating cooling water flowing through the circulating cooling water flow path using the spray water flowing through the spraying water flow path, in a countercurrent manner to the load section, communicates with the circulating cooling water outlet. A single-suction, cross-flow type small cooling tower characterized by   2. The single suction type and cross flow type small cooling tower according to claim 1, wherein the watering device is an upper water tank, and the spray water piping system is piped in the cooling tower.   3. The single suction type, cross-flow type small cooling according to claim 1, wherein the hermetic heat exchanger is disposed on an opposite side of the outside air intake port in an open space below the exhaust port. Tower.   4. The single suction type and cross flow type small cooling tower according to claim 1, wherein the hermetic exchanger is exchangeable as a block body.   5. The single suction type, cross-flow type small size according to claim 1, wherein the hermetic heat exchanger has a structure in which a peripheral surface thereof is covered with a heat insulating material and can be prevented from freezing. cooling tower.   The pipe line for blocking the sprayed water to the filling plate and returning it to the dropping water tank has a structure capable of selectively communicating with the sprayed water outlet side in the sealed heat exchanger and preventing freezing. The single suction type, cross-flow type small cooling tower according to 3, 4 or 5.   The hermetic heat exchanger is a plate-type hermetic heat exchanger, and a large number of these are arranged in parallel so that the circulating cooling water flow path plate and the spray water flow path plate are in contact with each other. The single-suction type according to claim 1, 2, 3, 4, 5 or 6, wherein the periphery of the closed heat exchanger composed of a plate is completely brazed, and the whole is formed as one block body. Cross-flow type small cooling tower.   The hermetic heat exchanger is a pipe-type hermetic heat exchanger, and a plurality of pipes for circulating cooling water flow paths are piped in the box, and the countercurrent flow is applied to the pipes in the box. 7. The single-suction type cross-flow type small cooling tower according to claim 1, wherein the single-suction type cross-flow type cooling tower has a structure in which water flows.

Images