JP3334909B2 - Packing material for substance and / or heat exchange tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a material and / or packing for a heat exchange tower.

[0002]

2. Description of the Related Art Heretofore, one sheet-like substrate having a fold according to the present invention formed on its surface with this kind of filler is formed by two contacting and overlapping net-like sheets having a continuous mesh. Those that are known are widely used.

The effect of stacking two net-like sheets is as follows. One is, for example, a wire diameter of 0.1 mm and 1
In the case of a mesh of about 00 mesh, by stacking two of these meshes, it is possible to generate a capillary attraction for the liquid between the contact surfaces of the mesh, and as a result, the diffusion of the liquid throughout the filler is achieved. It will be a break. Another effect is to increase the surface area by stacking two nets.

However, of these two effects, in terms of increasing the surface area, the surface must function to promote the contact efficiency between the liquid and the gas. Must be considered in terms of actual contact. From that point on, simply superimposing is problematic. For example, when liquid is diffused when a mesh sheet made of two superimposed meshes is made into a fine mesh,
The liquid is held between the two nets and in the mesh, and about half of the surface area of the two nets is used for holding the liquid.
The surface that should be the interface for contact between the liquid and the gas is not fully utilized. In this regard, wetting the net without holding the liquid between the two nets, and using the entire surface of the net as a surface that creates a contact interface between the two phases of liquid and gas will have a greater effect. It can be achieved. In order to achieve this, it is conceivable to expand the mesh so that no liquid is retained in the mesh. However, as the mesh becomes larger, the degree of contact between the line portions of the two meshes decreases. ,
As a result, the surface area is reduced and the capillary attractive force per unit area is reduced, so that the chance of gas-liquid contact is reduced. At the same time, the diffusion of the liquid is inhibited, and sufficient performance cannot be obtained. It is also known to superimpose two fine and coarse nets, but if the coarse net becomes large, gas can flow into the net, but the surface area decreases and the capillary attraction decreases. It causes a decrease and inhibits liquid diffusion.

[0005]

The present inventor has conducted research to overcome the disadvantages of the prior art. As a result, the three net-like sheets are brought into contact with each other and formed by superimposition, and the mesh of the net-like sheet sandwiched in the three is made fine, and the two outer metal meshes in contact with the mesh are meshed with each other. By using a larger mesh, it is possible to improve the liquid diffusion capacity of the filler, the contact efficiency between the liquid and the gas, and reduce the pressure loss.

According to the present invention, a liquid is supplied from above and a gas is supplied from below, and gas and liquid are brought into contact with each other so that a material exchange and / or a heat exchange between the two are carried out along the axis of the column. A column-like packing material for a tower, the packing material having a plurality of continuous folds on the surface forming a waveform that is inclined with respect to the axis of the tower. The sheet-like base material in which a plurality of sheets are laminated so that the folds intersect and the folds are processed is formed by bringing three net-like sheets into contact with each other and overlapping each other, and the net-like sheets are at least two different from each other. One mesh sheet (A) has a wire diameter of 0.4 mm or less, and the mesh area per 1 cm ² of the mesh sheet (A) is 0.8 cm ^2.
In the following, two net-like sheets (B) are in contact with both sides of the net-like sheet (A), and each of the net-like sheets (B) is in the same area where the net-like sheet (A) comes into contact with the net-like sheet (A). In this case, the total area of the meshes is larger than the total area of the meshes of the mesh sheet (A), or the total of three meshes is 2 cm ² or less and 0.9 cm per 3 cm ^{2 of} the same contact area. ^{The present invention} relates to a substance and / or a packing material for a heat exchange tower, which is characterized by being ² or more.

[0007] The present invention also provides a liquid supply system for supplying a liquid from above and a gas from below, and bringing the gas and liquid into contact with each other so that the material exchange and / or heat exchange between the two can be performed inside the column. A sheet-like base material having a plurality of continuous folds formed on a surface thereof, which are arranged in a vertical direction along the tower, the plurality of continuous folds having a waveform in which the filler is inclined with respect to the axis of the tower. Are stacked so that the folds cross each other,
The sheet-like base material having the folds formed thereon is formed by contacting three or more net-like sheets and superimposing them, and the three net-like sheets are 1 cm in the same contacting area.
^{The present invention} also relates to a substance and / or a packing material for a heat exchange tower, characterized in that it has three superposed portions in which the total area of three meshes per ^two is 2.2 cm ² or less.

A net sheet (C) having the same or larger total mesh area within the same area of contact than the net sheet (B) outside at least one of the two net sheets (B).
May be overlapped one or more.

[0009]

The effect of the present invention will be described in more detail. The effect of using two wire mesh sheets in contact with each other in this type of filler is the diffusion of liquid due to capillary attraction and the gas-liquid contact. To increase the surface area for

[0010] The capillary attraction is described with reference to an example in which two wire meshes are overlapped and used. Since one wire mesh is woven so that a vertical line and a horizontal line intersect, two wire meshes are overlapped. In such a case, a part that contacts each other and a part that does not come into contact are generated. Capillary attraction is easily generated in the part that is in contact, and in the part that is not in contact, the larger the gap is, the more difficult it is to generate the capillary attraction. Further, the smaller the wire diameter and the smaller the mesh, the more the contact portion between the two sheets increases, and the capillary attraction generated between them increases, and at the same time, the diffusion force of the liquid also increases. In terms of capillary attraction, the shape of the upper mesh is as follows: wire diameter: 0.1 mm or less, number of meshes: about 100 mesh, mesh area:
0.05 mm ² or less is preferable.

[0011] The performance of such a filler is determined by the formation of a surface for contacting a large amount of liquid and gas in a limited space. Therefore, it is preferable that the entire surface of the two wire meshes can be used as a contact surface between the liquid and the gas even when the two wire meshes are overlaid.

[0012] However, there is a concomitant problem when trying to simultaneously increase the capillary attraction and the contact surface.

In order to contact two wire nets and diffuse the liquid by capillary attraction, it is necessary to increase the capillary attraction by making the wire thinner and the mesh smaller, but on the other hand, the inner surface of the contact portion and the inside of the mesh Since the liquid is held by the capillary attraction and surface tension, only the outer surface of the two wire meshes can be contacted with the gas, and the liquid is held in the mesh. This causes a problem that the gas cannot flow into the mesh.

In order for the gas to flow into the mesh,
By increasing the size of the mesh, the formation of a liquid film due to the surface tension of the liquid may be inhibited, and the retention of the solution may be reduced.However, when the size of the mesh is increased, the number of contact portions per unit area decreases. Causes a decrease in capillary attraction and induces a decrease in diffusion force. In addition, if the mesh is enlarged, the surface area for gas-liquid contact required for the filler is reduced.

[0015] The same applies to the superposition of a fine mesh network sheet and a coarse mesh network sheet. As the size of one mesh increases, the contact portion per unit area decreases. Reduces attractive force and reduces liquid diffusion. At the same time, the surface area decreases.

According to the present invention, three reticulated sheets are brought into contact with each other and overlapped with each other. In this case, the reticulated sheet (A) is in contact with the reticulated sheet (A) rather than the mesh size of the reticulated sheet (A) located on the middle side. By increasing the size of the mesh of the two outer net-like sheets (B), the above-mentioned opposing problem is solved as follows.

A) When two net-like sheets having the same mesh are stacked, the wire diameter of the net-like sheet is about 0.1 mm;
When the mesh size is about 100 mesh, the diffusion of liquid by capillary attraction can be realized because of the superposition of fine mesh sheets, but the contact between the liquid and gas does not allow the gas to flow into the contacting inner surface. It was difficult, but by stacking one large net-like sheet into three nets,
Promotes increased surface area and gas inflow. However, even in this case, there is a problem that the gas can only flow into the inside of the coarse sheet. In order to solve this problem, a conventional two-ply sheet is roughened and overlapped. In this way, the fine mesh sheet is located at the center and the fine mesh sheet is positioned outside the center, so that the gas can easily flow in from the outside, and when the gas flows upward from below, the rising gas flows in one direction. It is also possible to pass through three net-like sheets.

B) If the mesh of the two mesh sheets is different, it is possible for gas to flow into the mesh,
The larger the mesh size of one sheet, the less contact therewith, resulting in reduced capillary attraction and reduced liquid diffusion. In the superposition of these two sheets, three sheets are obtained by superimposing one more net-like sheet on the surface of the net-like net-mesh sheet, and by increasing the number of contact portions as compared with the case of two net-like sheets. As a result, the liquid holding force is increased, and as a result, the capillary attraction is also increased, and the diffusion of the liquid is promoted, and at the same time, the substantial surface area for gas-liquid contact can be increased. Also in this case, it is preferable that the additional superimposed sheets have a coarser mesh than the sheet sandwiched between them, against the inflow of gas from the outside.

In the above cases (a) and (b), it is necessary that the fine mesh sheet is located between three sheets. This is because, when the coarse-meshed sheets are put into each other and overlapped with each other, the capillary attractive force is reduced due to the contact between the coarse-meshed sheets, and the gas inflow is hindered due to the presence of the fine-meshed sheet on the outside.

In practice, the wire diameter of one mesh sheet (A) is about 0.1 mm, and the size of one mesh is 0.05 mm ²
It is preferable that the two net-like sheets (B) which are in contact with and located outside have a wire diameter of about 0.1 to 0.15 mm and a mesh size of about 0.2 mm ² . The gas can flow into the interior due to such a difference in the mesh. Larger values cause a reduction in capillary attraction, which causes problems with liquid diffusion.

When the size of the mesh of one net-like sheet (B) is about the above-mentioned size, it is better to make the size of the mesh of the other net-like sheet (B) equal to or smaller than that. Gets better. However, if it is too small and is made the same as the mesh sheet (A), the diffusion of the liquid is promoted, but there is a problem with the inflow of gas. Due to the small size of the two meshes, the liquid is retained between them and the gas flow is hindered. The basis of the present invention is to accumulate a large mesh sheet on the outside to promote gas inflow from the outside, and to allow gas to pass through three mesh sheets depending on the gas flow rate to some extent. It is intended to improve the contact between liquid and gas more than the result.

Therefore, the obstruction of the gas inflow on one side also impedes the inflow of the gas passing through the three net-like sheets, and induces an increase in the pressure loss that occurs when the gas rises. . For this reason, in the present invention, the net-like sheet (B) superimposed on both sides of one net-like sheet (A)
This problem is solved by making the mesh of the mesh sheet larger than the mesh sheet (A).

As described above, according to the present invention, three items of diffusion of liquid, improvement of gas-liquid contact, and reduction of pressure loss, which have been difficult to achieve when two reticulated sheets are conventionally used, are used. At the same time.

In the second aspect of the present invention, since three net-like sheets are overlapped with each other to improve gas-liquid contact and liquid diffusivity, the total area of the mesh formed by the three sheets is extremely small. This is an important requirement. For example, even when five sheets are superimposed on each other, three of the sheets satisfy the above-mentioned requirements, thereby improving the performance.

The reason why the total of the three meshes is set to 2.2 cm ^{2 or} less per 1 cm ² in the same area where the three net-like sheets are in contact with each other is that if the total area is more than 3 cm, the liquid holding of three sheets is made. , And from the viewpoint of the generation of capillary attraction, the performance as a filler will be reduced as compared with double,
This is the most important requirement in the present invention. However,
If holes are perforated in the mesh sheet, the perforated area shall be excluded.

The present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a state where the packing material of the present invention is packed along the tower axis, and (1) is a tower axis. (2) is a filler formed from a corrugated mesh sheet.

FIG. 2 is a perspective view of one filler.
(3) is a fine mesh sheet, (4) is a coarse mesh sheet, and (5) is another mesh sheet.

FIG. 3 is a sectional view of one filler.

Hereinafter, various embodiments of the present invention will be described.

(1) As shown in FIG. 4, holes (6) having an arbitrary size may be formed in an arbitrary position in a mesh sheet.

2 As shown in FIG. 5, one or a plurality of unfolded sheet-like substrates (7) or net-like sheets or stretched wire meshes or a combination thereof are provided between the creased fillers. May be pinched.

[0033] The filler may be made of metal, plastic or glass fiber.

The shape of the four meshes may be square or rectangular.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where the packing material of the present invention is packed along a tower axis.

FIG. 2 is a perspective view of one filler sheet according to one embodiment.

FIG. 3 is a cross-sectional view of one filler sheet according to one embodiment.

FIG. 4 is a perspective view of one filler sheet according to one embodiment.

FIG. 5 is a cross-sectional view of a filler sheet according to one embodiment.

Continuation of front page (56) References JP-A-5-288490 (JP, A) JP-A-5-103978 (JP, A) JP-A-2-6843 (JP, A) JP-A-63-151331 (JP) JP-A-62-279801 (JP, A) JP-A-60-23796 (JP, A) JP-A-54-16661 (JP, A) JP-A-54-15554 (JP, A) 63-16823 (JP, U) Japanese Utility Model 60-1401 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01J 10/00-12/02 B01J 14/00-19 / 32 B01D 3/00-3/42 B01D 53/14-53/18 F28F 25/08

Claims (2)

(57) [Claims] 1. A liquid is supplied from above and a gas is supplied from below,
A column packing material vertically arranged along an axis of the tower inside a column in which gas and liquid are brought into contact with each other to perform material exchange and / or heat exchange between the two, A plurality of sheet-like base materials in which a plurality of continuous folds forming a corrugated shape in which the filler is inclined with respect to the axis of the tower are processed on the surface are stacked so that the folds cross each other, and the folds are processed. The sheet-like base material is formed by bringing three net-like sheets into contact with each other and overlapping each other, and the net-like sheet has at least two different meshes, and has one inner mesh-like mesh.
Over preparative (A) is a wire diameter 0.4mm or less, the inner mesh sheet
The area of the mesh per 1 cm ^{2 of the} sheet (A) is 0.9 cm ²
The following are the two outer sheets on both sides of the inner net-like sheet (A).
The side mesh sheet (B) is in contact with the outer mesh sheet.
Over preparative (B), each total inner reticular sea area of the area of the mesh at the inside contact the same area of the inner net-like sheets (A) of
Larger than the total area of the mesh of the bets (A), and, said the total of the same area of 1 cm ² per three mesh contacting the three is 2.2 cm ² or less and 0.9 cm ² or more And / or packing material for heat exchange towers. Wherein further the total area of the mesh on the outside of at least one-way at the contact within the same area than the outer net-like sheets (B) of the two outer net-like sheets (B) are the same or greater
The filler according to claim 1, wherein one or more outer net-like sheets (C) are stacked.