JPH041275B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises forming a cooling tower cell with wet cooling sections facing each other, arranging a plurality of cells to form a cooling tower, and providing a dry cooling section within the cell to prevent wet operation. This invention relates to a dry/wet cooling water tower capable of both wet and dry operation.

Conventionally, multi-cell chilled water is constructed by arranging a plurality of chilled water tower cells in which wet cooling sections are formed in one of the chilled water towers in a row so that the wet cooling sections are aligned, and partition plates are provided between the chilled water tower cells. There is a tower.

Normally, in a cooling tower, heat is exchanged directly between the outside air and the hot water to be treated in the wet cooling section, so the outside air after heat exchange becomes humid air, and when this is directly exhausted from the fan stack, it is cooled and diffused into the atmosphere. Humid air becomes supersaturated and the exhaust becomes white smoke. This white smoke formation of exhaust gas occurs noticeably in the winter when the outside air temperature is low, so there are problems such as, for example, when white smoke adheres to trees, it freezes and causes the leaves to wither.

Therefore, a wet cooling section and a dry cooling section in which outside air and the hot water to be treated indirectly exchange heat are used together, and the humid air generated in the wet cooling section is mixed with the dry air generated in the dry cooling section to reduce the absolute humidity of the exhaust air. Dry and wet cooling towers are being adopted to lower the temperature and prevent the exhaust from turning into white smoke.

However, as mentioned above, white smoke in the exhaust gas is noticeable in the winter, but less so in the summer, so it is necessary to perform dry/wet operation in the winter and only wet operation in the summer.

The object of the present invention is to provide a dry/wet type cooling water tower that can perform dry/wet operation even in the above-mentioned multi-cell type cooling tower, and can only perform wet operation in the summer, and does not waste the installation space of the dry cooling section. This is what we provide.

The present invention provides a plurality of cold water tower cells formed by opposing wet cooling towers arranged side by side so that their wet cooling parts are aligned, a partition plate is provided between the cold water tower cells, and a communication port is provided in the partition plate, A dry cooling unit is provided on one cell side of the communication port, an opening/closing door for opening and closing the communication port is provided on the other cell side, and a partition is provided in the wet cooling unit on the tip side of the door when the communication port is opened. The feature is that a dry/wet passage is formed in the wet cooling section located between the tip of the door and the partition plate, and when wet operation is performed in the summer, the opening/closing door is closed and hot water to be treated is supplied only to the wet cooling section. The hot water to be treated is wet-cooled by supplying water, and in winter, the door is opened and its tip is brought into contact with the partition wall, and the hot water to be treated is supplied to the wet cooling section between the partition wall and the partition plate. The outside air from the dry passage is introduced into the dry cooling section through the communication port, and dry and wet operations are performed at the same time to prevent the exhaust from turning into white smoke.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a dry/wet cooling tower according to the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, a cooling tower cell 2 is formed in which wet cooling units 1, 1 that directly exchange heat between external air and hot water to be treated face each other. This cooling tower cell 2
are arranged so that the wet cooling units 1, 1 are aligned and parallel to each other, and a partition plate 3 is provided between each cell 2. A communication port 4 is provided close to both wet cooling units 1, 1 side of the partition plate 3, and dry cooling units 5, 5 consisting of finned tubes are provided in the communication ports 4, 4 on both sides. One of the dry cooling units 5, 5 provided in the communication ports 4, 4 on both sides is provided in one chamber of the cell 2 on both sides partitioned by the partition plate 3, and the other is provided in the other chamber of the cell 2. . Also, both communication ports 4,
4 are provided with opening/closing doors 6, 6 on the sides facing the dry cooling units 5, 5, respectively, and a louver 10a which can be opened and closed is provided on the exit side of the dry cooling unit 5. The opening/closing doors 6, 6 have their tips 6a, 6a located on the wet cooling units 1, 1 side, respectively, and when closed, the communication port 4 is closed, and when opened, they are provided inside the wet cooling unit 1. A dry/wet passageway 8 is formed in the wet cooling section 1a in contact with the partition wall 7 and between the partition wall 7 and the partition plate 3. A wet cooling section 1b exclusively for wet cooling is formed on the other side of the partition wall 7. Furthermore, dry cooling units 5 are provided on the side plates 9 of the cells 2 on both the left and right sides of the cells 2 arranged in parallel, and louvers 10a that can be opened and closed for introducing external air into the dry cooling units 5 are provided.

A supply tank 11 for hot water to be treated is provided in the upper part of the wet cooling unit 1 of each cell 2, and a cold water tank 1 is provided in the lower part.
2 is provided. The supply tank 11 has a dry/wet passage 8
The wet cooling section 1a forming the wet cooling section 1a and the wet cooling section 1b exclusively for wet cooling are partitioned so that hot water to be treated can be supplied separately. An upper hot water header 13 is provided above the supply tank 11, and each wet cooling section 1a,
a valve 14 for supplying hot water to be treated to 1b;
15 are provided.

Further, a lower hot water header 16 is provided for supplying hot water to be treated to the dry cooling unit 5, and a valve 17 is provided, respectively.
It is connected to the dry cooling section 5 via. An outlet pipe 18 of the hot water to be treated in the dry cooling section 5 is connected to the upper hot water header 13.

The upper hot water header 13 is connected to the main hot water header 21 via a standpipe 19 and a valve 20, and the lower hot water header 16 is also connected to the main header 21 via a valve 22.

A pipe 23 for supplying cold water after cooling treatment to various plants is connected to the cold water tank 12, and a wet cooling unit 1 is connected to the upper center of each cell 2 to supply external air.
A fan stack 24 is provided for introduction into the cell 2 through.

Next, the operation of the present invention will be explained.

When only wet operation is performed, such as during summer, the opening/closing door 6 and the louver 10a are closed, the communication port 4 is closed, and the louvers 10b of the left and right cells are also closed. The valves 22 and 17 that supply the hot water to be treated from the main hot water header 21 to the dry cooling section 5 are closed, and the valves 20, 14, and 15 that supply hot water to be treated to the wet cooling sections 1a and 1b are opened, and all wet cooling The heated water to be treated is supplied to the wet cooling section 1, and is caused to flow down from above the wet cooling section 1, and is brought into direct contact with the external air sucked by the fan stack 24 to cool the hot water to be treated. The external air after heat exchange is exhausted from the fan stack 24.

In the case of dry or wet operation such as in winter, the tip 6a of the opening/closing door 6 is opened to the position of the partition wall 7, and the valve 22 supplies hot water to be treated to the dry cooling section 5.
17 is opened, and the wet cooling section 1a of the dry/wet type passage 8 is opened.
The valve 14 for supplying hot water to be treated is closed, the valve 15 for supplying hot water to be treated to the other wet cooling section 1b is opened, and the upper header 13 is closed.
The valve 20 of the standpipe 19 that supplies hot water to be treated is closed. Further, the louvers 10a of each dry cooling unit 5 and the louvers 10b of the left and right cells 2 are left open. The hot water to be treated flows from the main hot water header 21 to the lower header 6, passes through the dry cooling section 5,
It flows from the outlet pipe 18 to the upper header 13 and is supplied to the wet type cooling section 1b exclusively for wet type via the valve 15. The external air sucked by the fan stack 24 directly exchanges heat with the hot water to be treated in the wet cooling unit 1b, but since the hot water to be treated is not supplied to the other wet cooling unit 1a, it passes through the dry/wet type passage 8 and passes through the opening/closing door. 6 and flows through the communication port 4 into the dry cooling section 5 in the other adjacent cell 2, where it undergoes indirect heat exchange. Therefore, each cell 2
Inside, the humid air generated in the wet cooling section 1b and the dry air generated in the dry cooling section 5 are mixed, so that the exhaust gas is prevented from turning into white smoke. In this case, the hot water to be treated passes through the dry cooling section 5 and then flows into the wet cooling section 1b, so that high temperature dry air is obtained in the dry cooling section 5, and when mixed with humid air, white smoke is further prevented. Since this dry cooling section 5 is provided close to the wet cooling section 1b facing each other in the cell 2, it does not obstruct the flow of air flowing into the cell 2 from the wet cooling section 1b near the dry cooling section 5 as shown in the figure. It is formed into a rhomboid or diagonal parallelogram shape.

Further, the cooled hot water to be treated is supplied as cooling water from the cold water tank 12 to various plants through a pipe 23.

As is clear from what has been described in detail above, the present invention exhibits the following excellent effects.

(1) A communication port is provided in the partition plate of the parallel cooling tower cells, an opening/closing door is provided on one side of the communication port, and a dry cooling section and a louver that can be opened and closed are provided on the other side.
Furthermore, the wet cooling section is equipped with a dry/wet passageway that introduces outside air into the dry cooling section when the door is opened, so all wet cooling sections can be operated during wet operation during periods of high outside air temperature such as summer, and during winter. During dry/wet operation when the outside air temperature is low, the dry passage can be used as a passage to guide the outside air to the dry cooling section, allowing dry/wet operation to be performed and preventing the exhaust from turning into white smoke.

(2) Since a dry cooling section is installed inside the cell, dry and wet operations can be performed at the same pace as conventional wet cooling towers.

(3) Since the dry cooling section can be installed at ground level within the cell, there is no need for a special structure for installing the heavy dry cooling section.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a dry/wet cooling tower according to the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG. 1. In the figure, 1 is a wet cooling unit, 2 is a cooling tower cell, 3 is a partition plate, 4 is a communication port, 5 is a dry cooling unit, 6 is an opening/closing door, 7 is a partition wall, and 8 is a dry/wet type passage.

Claims (1)

[Claims] 1. A plurality of cooling tower cells each having wet cooling sections facing each other are arranged side by side so that the wet cooling sections are aligned, and a partition plate is provided between the cooling tower cells,
A communication port is provided in the partition plate, a dry cooling unit is provided on one cell side of the communication port, an opening/closing door for opening/closing the communication port is provided on the other cell side, and a door is provided on the tip side when the opening/closing door is opened. A dry/wet cooling section characterized in that a partition wall is provided in the wet cooling section to form a dry/wet passageway in the wet cooling section located between the tip of the door and the partition plate.
Wet cooling tower.