JPH0942862A - Cooling tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly guide circulating cooling water flowing through an air- liquid contact passage in the upper stage to the air-liquid contact passage in the lower stage through a connecting body, to prevent the water from flowing into adjacent exclusive passages of air, to discharge dry air of a desired flow rate from the exclusive passages of air in all stages into air passages of a cooling tower, in parallel with wet air, and thereby to prevent occurrence of white smoke without fail. SOLUTION: The peripheral edge parts of discharge port parts 12d and inlet parts 12e of air-liquid contact passages 12a in the upper and lower stages are inserted into a groove part of a connecting body 13 which is opened in the upper and lower parts and formed of a virtually hollow rectangular parallelepiped, and the air-liquid contact passages 12a in all stages are made to communicate with each other by this connecting body 13 over the total height of an outdoor-air intake.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cooling tower, and more particularly to a cooling tower having a white smoke generation preventing function.

[0002]

2. Description of the Related Art As a typical cooling tower of this type, a large number of packing plates are installed in a multi-tiered manner at intervals in the width direction of the outside air intake, and are exclusively used for air between the packing plates of each stage. The dry air blown out from the passage and the moist air blown out from the gas-liquid contact passage are raised toward the common exhaust port, mixed by the rotation of the blower installed in this exhaust port, and exhausted to the outside air without becoming supersaturated air and white smoke To prevent the occurrence of.

[0003]

In the cooling tower of the type in which the packing plates are installed in the upper and lower stages as described above, all of the circulating cooling water dispersed in the upper gas-liquid contact passage is in the lower gas-liquid contact passage. It does not flow down into the air, but a part of it collides with the packing plate support shelf, etc., and it tends to flow down into the adjacent air passage in the lower stage adjacent to it. , White smoke may be generated a little in winter, though it does not interfere with transportation. An object of the present invention is to provide a market with a cooling tower that eliminates the above-mentioned phenomenon and reliably prevents the generation of white smoke. Another object of the present invention is to provide to the market a cooling tower in which the packing plates forming the gas-liquid contact passage can be easily arranged in the upper and lower stages.

[0004]

In order to achieve the above-mentioned object, a specific invention is to install a large number of packing plates in a cooling tower main body in upper and lower multi-stages at intervals in the width direction of the outside air intake. In the cooling tower where the dry air blown out from the air passage between the filling plates of the and the moist air blown out from the gas-liquid contact passage are mixed and exhausted to the outside from the cooling tower exhaust port without white smoke, The liquid contact passage is composed of a set of two filling plates, the bottom of the upper gas-liquid contact passage is closed, and at least one circulating water discharge port is formed on the bottom so as to project downward. The lower gas-liquid contact passage is composed of a set of two filling plates, the ceiling portion of the lower gas-liquid contact passage is closed, and the circulating cooling water inlet portion corresponding to the circulating cooling water discharge outlet portion is located in this ceiling portion. Is it a hollow body that is formed to project upwards and is open at the top and bottom? The upper and lower ends of the peripheral wall of the connecting body are formed with filling plate receiving grooves for receiving the peripheral portions of the discharge port and the inlet, and the discharge port and the inlet of the upper and lower gas-liquid contact passages are Connected to each other by a connector,
The gas-liquid contact passages at all stages over the entire height of the outside air intake are
The cooling tower is characterized by being in communication with each other.

In order to solve the above-mentioned problems, the discharge port and the inlet of this cooling tower are flat rectangular, the width thereof is the same as that of the gas-liquid contact passage, and the connecting body is a substantially hollow rectangular parallelepiped. Is preferable for the downward flow guide of the circulating cooling water. In order to solve the above problems, a set of two packing plates forming the gas-liquid contact passage in the upper stage of the cooling tower has a gas-liquid contact passage near the bottom on the outside air intake side and the exhaust port side. It is preferable in terms of preventing carry-over of water droplets that the plates are joined by a vertical plate material over the entire width.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION This mode is a typical embodiment of the invention described in claims 1, 2, and 3. In FIG. 2, an outside air intake 11 is formed in the main body (not shown) of the entire cross flow type cooling tower A. A large number of packing plates 12 are arranged in the main body of the cooling tower A at least in two upper and lower stages, and three in a manner shown in the drawing, at intervals across the width of the outside air intake 11. A gas-liquid contact passage 12a and an air-only passage 12b are formed in a mixed manner between the adjacent filling plates 12 in each stage. At this time, the upper gas-liquid contact passage 1
2a is composed of a set of two filling plates 12, and the bottom portion 12c of the gas-liquid contact passage 12a in the upper stage is closed.
Two planar rectangular circulating water discharge ports 12d are formed on c at two intervals and project downward (see FIG. 1). The lower gas-liquid contact passage 12a is a set of two filling plates 1
2. The ceiling portion 1 of the lower gas-liquid contact passage 12a
2f is closed, and two circular cooling water inlets 12e, which are rectangular in plan view and correspond to the circulating cooling water discharge port 12d, are formed on the ceiling so as to project upward. The discharge port section 1
2d, the width of the inlet portion 12e is the same as the width of the gas-liquid contact passage 12a (see FIGS. 1 and 3). Filling plate receiving groove portions 17, 18 are formed from the upper and lower ends of the peripheral wall of the connecting body 13 formed of a substantially hollow rectangular parallelepiped having an opening at the top and bottom toward the inside,
The peripheral portions of the discharge port portion 12d and the inlet portion 12e of the upper and lower gas-liquid contact passages 12a, 12a are connected to each other by the connecting body 13.
The gas-liquid contact passages 12a of all stages, which are inserted into the groove portions 17 and 18 of the above, and extend over the entire height of the outside air intake 11, are communicated with each other by this connecting body 13 (FIG. 1, FIG. 2, FIG. 3, FIG.
(See FIGS. 4 and 5). Furthermore, the gas-liquid contact passage 1 at the upper stage
The set of two filling plates 12 forming the 2a is the outside air intake 1
The first side and the exhaust port (not shown) are joined by a vertical plate member 19 extending over the entire width of the gas-liquid contact passage 12a near the bottom portion 12c (see FIG. 1).

The operation of this form will be described below. The warm water, which is the circulating cooling water sprayed from the upper water tank B which is a water sprinkler in the cross flow type cooling tower A, simultaneously flows into the gas-liquid contact passage 12a at the uppermost stage through the water sprinkling pipes C from the upper end thereof. It is dispersed in the gas-liquid contact passage 12a and forms a wetting wall on the surfaces of the filling plates 12 on both side walls. These filling plates 12
The hot water flowing down on the surface and between the filling plates 12 is in direct contact with the air flow sucked from the outside air intake 11 in the cooling tower main body in a direction orthogonal to the hot water flow down direction, as in a normal cross flow type cooling tower, and The hot water is cooled by the latent heat effect of vaporization of which a part is evaporated. The air after cooling the hot water is discharged as humid air into the ventilation passage in the cooling tower A and rises toward the exhaust port. On the other hand, in the air-only passage 20, the outside air flowing from the outside air intake 11 flows through the air-only passages, does not come into direct contact with the circulating cooling water flowing down the gas-liquid contact passage 12 a, and passes through the filling plate 12. And indirectly contact with each other, the outside air is heated without a rise in humidity, and is discharged as dry air into the ventilation passage in the cooling tower A. At this time, by the connecting body 13, the circulating cooling water flowing in the upper gas-liquid contact passage 12a flows down into the lower gas-liquid contact passage 12a through the discharge port 12d, and the air flowing in the adjacent air-only passage. Completely isolated from the flow. Along with this, the vertical plate 1
9 prevents the warm water at the bottom of the gas-liquid contact passage 12a in the upper stage from forming water droplets and scattering to the outside air intake 11 side and the exhaust port side. Thus, the moist air discharged from the gas-liquid contact passages 12a in all stages and the dry air discharged from the air passage 12b in all stages are mixed in the ventilation passage of the cooling tower A while forming a laminar flow and rising. However, it is discharged from the exhaust port of the cooling tower A without becoming supersaturated air, that is, without white smoke.

In this embodiment, the connecting body 13 is a substantially hollow rectangular parallelepiped, but it has a plane circular shape (see FIG. 7) and an oval shape (see FIG. 6).
It may be a rhombus, a triangle, or a polygon, and the point is that the invention is the same as long as it is a hollow body having upper and lower openings. According to the planar shape of the connecting body 13, the discharge port portion 12d,
It goes without saying that the inlet portion 12e is formed.

[0009]

According to the first and second aspects of the present invention, the circulating cooling water flowing in the upper gas-liquid contact passage is smoothly passed through the circulating cooling water discharge port to the lower gas-liquid contact passage by the connecting body. And can be prevented from flowing into the adjacent air passage. Therefore, a desired flow rate of dry air can be discharged into the cooling tower exhaust passage from the air passage for all stages,
It is possible to reliably prevent the generation of white smoke.

According to the invention of claim 3, in addition to the effects of the inventions of claims 1 and 2, carry-over to the outside of the circulating cooling water in the vicinity of the bottom of the gas-liquid contact passage in the upper stage is prevented, and in the lower stage. Circulating cooling water can be guided through the discharge port into the gas-liquid contact passage.

[Brief description of drawings]

FIG. 1 is a schematic side view of a partially omitted embodiment.

FIG. 2 is a schematic vertical sectional front view of this embodiment.

FIG. 3 is a schematic front view showing a usage state of the connected body in FIG.

4 is a plan view of the connected body in FIG. 1. FIG.

5 is an enlarged sectional view taken along line 5-5 of FIG.

FIG. 6 is a plan view of a connector different from FIG.

FIG. 7 is a plan view of a connector different from FIG.

[Explanation of symbols]

 13 Connected body

Claims (3)

[Claims] 1. A large number of packing plates are installed in the cooling tower main body in a multi-tiered manner at intervals in the width direction of the outside air intake, and dry air blown out from a dedicated air passage between the packing plates at each stage In a cooling tower that mixes moist air blown out from the liquid contact passage and exhausts it to the outside from the cooling tower exhaust port without white smoke, the upper gas-liquid contact passage consists of a set of two packing plates. The bottom of the upper gas-liquid contact passage is closed,
At least one circulating water discharge port is formed so as to project downward, and the lower gas-liquid contact passage is composed of a pair of filling plates, and the ceiling of the lower gas-liquid contact passage is closed. A circulating cooling water inlet part corresponding to the cooling water discharge part is formed on the ceiling so as to project upward, and the discharge port part is formed at the upper and lower ends of the peripheral wall of the connecting body made of a hollow body open at the top and bottom. And a filling plate receiving groove for receiving the peripheral portion of the inlet portion, the discharge port and the inlet of the upper and lower gas-liquid contact passages are mutually connected by this connecting body, and the entire height of the outside air inlet is maintained. The cooling tower is characterized in that the gas-liquid contact passages of the stages are communicated with each other. 2. The cooling according to claim 1, wherein the discharge port portion and the inlet portion are flat rectangular, the width thereof is the same as that of the gas-liquid contact passage, and the connecting body is a substantially hollow rectangular parallelepiped. Tower. 3. Two sheets 1 forming the upper gas-liquid contact passage
The cooling tower according to claim 1 or 2, wherein the pair of filling plates are joined by a vertical plate member over the entire width of the gas-liquid contact passage near the bottom on the outside air intake side and the exhaust port side.