JPH0531437Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention (industrial application field) This invention consists of a plurality of synthetic resin plate-like bodies of the so-called liquid film type that distribute liquid in a thin film form and bring it into contact with gas in the vertical direction. This invention relates to a wet heat exchanger for a cross-flow cooling tower, in which air passages are arranged in a hierarchical manner in a substantially horizontal direction with gaps between adjacent plate-shaped bodies, and each air passage is formed between adjacent plate-shaped bodies to flow horizontally.

(Prior art) Various types of liquid film type synthetic resin plate bodies have been developed.
No. 9681, Design Registration No. 389484, Design Registration No. 389484
There are numbers, etc.

(Problem to be Solved) The synthetic resin plate-shaped bodies of the prior art are used as a wet heat exchanger for a cross-flow cooling tower in which a plurality of plates are arranged vertically and adjacent to each other. The sprayed circulating water forms a wet wall on these vertical synthetic resin plate-like bodies and flows down, but the residence time of the circulating water for each plate is longer than the time when the synthetic resin plate-like bodies are vertically erected. Because the height of the synthetic resin plate is about 2 meters, the contact time with the horizontal air flow is short, about 5 to 6 seconds, and the heat is not absorbed at once. There are cases where it is difficult to cool a large volume of circulating water sprinkled over the exchanger to a predetermined temperature on the wet heat exchanger for a cross-flow cooling tower.

This idea is completely different from the conventional arrangement of synthetic resin plate bodies, and by forming flat recesses for cooling water collection and falling in a specific arrangement on the synthetic resin plate bodies, horizontal The purpose of the present invention is to provide on the market a wet heat exchanger for a cross-flow cooling tower, which allows sufficient contact time between the directional air flow and the cooling water.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the wet heat exchanger for cross-flow cooling towers of this invention consists of a plurality of synthetic resin plate-like bodies arranged hierarchically with gaps in the vertical direction. In a wet heat exchanger for a cross-flow cooling tower, which is arranged in a substantially horizontal direction and has one air passageway flowing horizontally between adjacent plate-shaped bodies, the plate-shaped bodies are generally rectangular in plane. It is shaped like a plate,
Ribs intersecting each other at right angles are formed at intervals in this central flat part, and the top of each rib is lower than the peripheral edge of the plate-shaped body, and these ribs form a plurality of central flat parts. is divided into rectangular flat depressions, and a diagonal rib shorter than the rib is formed on the upper surface of each flat depression,
A large hole for watering is bored in each triangular flat depression area divided into two by this diagonal rib, and the direction of the diagonal rib formed in the flat depression in the upper and lower adjacent plates is as follows. The large holes for watering are perpendicular to each other, and the positions of the large holes are shifted from each other.

In order to achieve the above object, in the wet heat exchanger for a cross-flow cooling tower of this invention, the spacers forming the air passages are arranged at the intersections of tall ribs, and each spacer It consists of at least three bosses that are continuous along the direction, and among these three bosses, the central boss may be formed to protrude on the opposite side from the bosses on both sides.

In order to achieve the above object, in the cross-flow cooling tower wet heat exchanger of this invention, the spacers in the plate-shaped bodies of each stage have the same shape in the direction perpendicular to the air flow, and Adjacent spacers in the flow direction have different shapes, and the central bosses of the spacers of the plate-like bodies that are vertically adjacent to each other are shaped so that they abut against each other with their protruding directions opposite to each other. In some cases.

In order to achieve the above object, in the wet heat exchanger for a cross-flow cooling tower of this invention, the wall extending from the peripheral edge of each plate-shaped body to the central flat part is formed in a step-like manner, and the peripheral wall and the nearest back wall are formed in a stepped manner. In some cases, each of the flat depressions near the periphery surrounded by the high ribs is also provided with at least one hole for water sprinkling.

(Operation) The operation of this device configured as described above will be explained.

The heat exchanger is packed into the main body of a cross-flow cooling tower in such a manner that its air passages are horizontal. In this state, when the cooling water sent from the load section to the upper water tank is supplied from the upper water tank to the upper surface of the uppermost synthetic resin plate of the heat exchanger, the cooling water flows through the synthetic resin plate. It spreads over the upper surface of the surface, temporarily stays in each flat depression, comes into contact with the horizontally flowing airflow, and is cooled by the latent heat of vaporization. Next, the cooling water is distributed to each large hole using the diagonal rib as a boundary, and falls from each large hole onto the flat recess of the synthetic resin plate below. This falling cooling water hits the low ribs and is distributed in two directions and spreads within the flat recessed area, temporarily staying in the entire flat recessed area on the top surface of this plate-like body, and comes into contact with the horizontally flowing air flow and vaporizes. It is cooled by the latent heat action of

This cooling effect is applied downwardly, temporarily staying in the flat recess, and each time it falls through the large hole, it is received at the central flat part of each synthetic resin plate, and then it is sufficiently cooled to reach a predetermined temperature. Water falls into the lower water tank of the cooling tower from the flat recess of the lowermost synthetic resin plate, is collected, and then circulated and supplied to the load section again.

At this time, even if the water level of the cooling water that has fallen into each flat depression area increases above the height of the short rib, it will be prevented from flowing to other flat depressions other than this flat depression, and the cooling water will respond to the increased amount. Therefore, the residence time in this flat depression becomes longer. Furthermore, even if the amount of cooling water increases and exceeds these tall ribs,
Cooling water is filled over the entire area of these flat depressions,
A considerable amount of the cooling water flows down from the large holes, and the rest remains within the entire central flat part of the plate, and does not overflow from the periphery of the plate located above the tops of the tall ribs.

When the spacer is located at the intersection of tall ribs, an air passage is formed by the butt of the spacers of the synthetic resin shaped bodies that are vertically adjacent to each other, and the cooling water that flows horizontally through these air passages flows downward. are in direct contact with each other in a cross flow and are cooled in the same manner as described above.

In addition, in cases where at least one small watering hole is drilled in the peripheral edge of the plate-shaped body and the flat depression near the peripheral edge surrounded by the nearest tall rib, water can also be obtained from these small holes near the peripheral edge. The cooling water flows down and temporarily stays in the lower flat recess, where it is cooled in the same manner as described above by direct contact with the air.

<Example> Next, a typical example of this invention will be described below.

In FIG. 1, A is a wet heat exchanger for a cross-flow cooling tower, and this heat exchanger A consists of a plurality of synthetic resin plate-shaped bodies 10 arranged in a hierarchical manner in a substantially horizontal direction with gaps in the vertical direction. The air passages 10a flowing horizontally are formed between adjacent plate-like bodies 10.

The synthetic resin plate member 10 is rectangular in plan and has a dish-like shape as a whole, and the central flat portion 11 is formed with ribs 12a and 12b spaced apart from each other and intersecting each other at right angles.

Each of these ribs 12a, 12b is formed by bulging the synthetic resin plate-like body 10 upward, and the top portions of these ribs meet the peripheral edge 13 of the plate-like body 10.
It is considered a lower level. That is, the peripheral wall 1 of the plate-shaped body 10
4, these ribs 12a, 12b are formed lower.

These ribs 12a and 12b form the central flat part 11.
is divided into a plurality of flat recesses 15 each having a rectangular plane. The ribs 12c are formed on the upper surface of each of these flat recesses 15. This diagonal rib 1
A large hole 16 for watering is drilled in the center of triangular flat depression areas 15a and 15b divided into left and right halves by 2c. Rib 1 of each diagonal mentioned above
2c The plate-shaped body 10 is formed to bulge upward.

Flat area depression 15 in the above-mentioned upper and lower adjacent plate-like bodies
The diagonal ribs 12c formed on the upper plate-shaped body 10' are orthogonal to each other with their directions being 90 degrees different from each other, and the positions of the large holes 16 for watering are shifted from each other. 12c', the large hole 16'' of the lower plate-like body 10'' is located, and the upper large hole 16' is located directly above the lower rib 12c'', and the plurality of plate-like bodies 10 (=10', 1
0'',...) are arranged horizontally in a hierarchical manner (see Figure 2).

Further, the spacer 17 forming the air passage 11 is arranged at the intersection of the tall ribs 12a and 12b, and each spacer 17 is composed of three bosses 18, 19, 20 that are continuous in the air flow direction. Of these three bosses 18, 19, 20, the central boss 19 is formed to protrude on the opposite side from the bosses 18, 20 on both sides.

Among the spacers in the plate-like body 10 at each stage, spacers 17 have the same shape in the direction perpendicular to the air flow and are adjacent in the air flow direction.
have different shapes, and the central bosses 19 of the spacers 17 of the vertically adjacent plate-like bodies 10 are shaped so that they abut against each other with their protruding directions opposite to each other.

From the peripheral edge 13 of each plate-shaped body 10 to the central flat part 1
A peripheral wall 14 extending over one area is formed in a step-like manner, and this peripheral wall 14 and the nearest tall rib 12
A small hole 22 for water sprinkling is also provided in the flat recess 15c near the peripheral edge 13 surrounded by a and 12b, and the vertically adjacent small holes 22 are vertically shifted from each other like the large hole 16.

C. Effects of the invention The effects of this invention, which is structured and operates as described above, are as follows.

In other words, the time it takes for the cooling water that has been dropped onto the top layer of synthetic resin plates to reach between the bottom layer of synthetic resin plates is compared to that of the conventional multiple synthetic resin plates. Compared to a wet heat exchanger arranged vertically in parallel, the heat exchanger can be collected several times longer, has sufficient contact with the air flow before falling into the lower water tank, lengthens the vaporization time, and substantially accelerates vaporization. It is sufficiently affected by the latent heat of vaporization and can be sufficiently cooled to a predetermined temperature.

Furthermore, even if the water level of the cooling water that has fallen into each flat depression increases above the height of the short rib, the tall ribs surrounding this flat depression will prevent the cooling water from flowing out to other flat depressions. This increases the amount of time the cooling water stays in these flat recesses, increasing the amount of time the cooling water stays in these flat recesses. Water can be filled with water, a considerable amount of cooling water can flow down from the large hole, and the rest can remain in the central flat part of the plate-shaped body, and the remaining part can be left from the periphery of the plate-shaped body located higher than the top of the tall rib. The risk of overflow can be eliminated.

Furthermore, since the continuous bosses in each spacer are aligned in the air flow direction, the continuous bosses in the spacers in the plate-like bodies at each stage do not disturb the flow of air sucked into the cooling tower main body from the outside air intake. , can reduce air resistance, and
The power consumption of the blower can be saved, and as a result, the blower can be made smaller.

Further, the continuous bosses of the spacers adjacent in the direction perpendicular to the air flow direction are butted against each other with their flat end surfaces on both the front and back sides of the gas-liquid contact filling plate, so that the gas-liquid contact between the adjacent gas-liquid contact filling plates is Since one contact passage is formed, the amount of protrusion of each continuous boss in each spacer from the plate-like body of the gas-liquid contact filling plate can be reduced to about half the width of this gas-liquid contact passage. .

In addition, in cases where at least one small watering hole is drilled in the peripheral edge of the plate-shaped body and the flat depression near the peripheral edge surrounded by the nearest tall rib, water can also be obtained from these small holes near the peripheral edge. The cooling water can flow down, temporarily stay in the lower flat recess, and be cooled in the same way as described above by direct contact with the air.

The gas-liquid contact packing plate of this invention, which is constructed and operates in this way, can be used as a gas-liquid contact packing material for gas absorption towers, cold and wet towers, gas generation towers, etc. in addition to cooling towers, and furthermore It can also be used as a filling material for wastewater treatment such as sprinkler filter beds and fixed filter beds.

The functions and effects of the embodiment constructed as described above are the same as those of this invention.

[Brief explanation of the drawing]

The figures relate to this invention, and Fig. 1 is a plan view of one plate-like body in this embodiment, Fig. 2 is a schematic vertical cross-sectional view showing the overlapping state of the plate-like bodies, and Fig. 3
The figure is a partially enlarged longitudinal sectional view of Fig. 1, Fig. 4 is a longitudinal sectional view showing the arrangement of ribs on a single plate, Fig. 5 is a partially cutaway side view of a type of spacer, and Fig. 6. 5 is a partially cutaway side view showing a spacer whose protruding direction is opposite to that of FIG. 5, and FIG. 7 is a schematic diagram of a cross-flow type cooling tower incorporating this heat exchanger. Main symbols in the figure: 11...Central flat part, 16...
...Large hole.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of synthetic resin plate-like bodies arranged in a hierarchical manner in a substantially horizontal direction with gaps in the vertical direction, and air passages that flow horizontally between adjacent plate-like bodies. In a wet heat exchanger for a cross-flow cooling tower, the plate-shaped body is rectangular in plan and has a dish-like shape, and the central flat part has ribs intersecting each other at right angles at intervals. The top of each rib is lower than the periphery of the plate-like body, and these ribs divide the central flat part into a plurality of rectangular flat recesses, and the upper surface of each flat recess is A diagonal rib shorter than the rib is formed, and a triangular flat depression area divided into two by the diagonal rib is provided with a large hole for watering. The directions of the diagonal ribs formed in the flat depressions of the plate-shaped body are mutually orthogonal,
A wet heat exchanger for a cross-flow cooling tower, characterized in that the positions of large holes for water sprinkling are shifted from each other. 2. The spacer forming the air passage is arranged at the intersection of the tall ribs, and each spacer consists of at least three bosses that are continuous along the air flow direction, and among these three bosses, the center A wet heat exchanger for a cross-flow cooling tower according to claim 1, wherein the bosses are formed to protrude on the side opposite to the bosses on both sides. 3. The spacers in the plate-like bodies in each stage have the same shape in the direction perpendicular to the air flow, and spacers adjacent to each other in the air flow direction have different shapes, and the spacers in the plate-like bodies adjacent above and below have the same shape. Utility model registration claim 1, characterized in that the central bosses of the body spacers are shaped so that their protruding directions abut against each other in opposite directions.
A wet heat exchanger for a cross-flow cooling tower as described in . 4. A wall extending from the peripheral edge of each of the plate-shaped bodies to the central flat part is formed in a step-like manner, and a small hole for watering is also provided in a flat depression near the peripheral edge surrounded by this peripheral wall and the nearest tall rib. A wet heat exchanger for a cross-flow cooling tower according to claim 1, wherein at least one perforation is provided.