JPH0780276A - Liquid redistributor for mass and/or heat exchange tower - Google Patents

Abstract

PURPOSE:To provide a liquid redistributor having a simple structure, enabling efficient redistribution in spite of reduced height and used in the state positioned at the middle stage of the structure packed in a tower bringing a liquid and gas into contact with each other in a countercurrent state to receive the liquid flowing down from the upper part of the tower and uniformly redistributing the liquid to the packing material present in the lower part of the tower. CONSTITUTION:A liquid redistributor is constituted of many liquid collecting plates 2 extending in the direction parallel to the cross section of a tower and attached so as to be inclined with respect to the axial line 1 of the tower and grooves are formed to the liquid collecting plates 2 in the direction parallel to the cross section of the tower. A means for allowing a liquid to uniformly fall over the total width of the liquid collecting plates 2 is formed and, in such a state that the liquid redistributor is arranged in the tower, the upper surface parts in the vertical direction of the greater part of the grooves 3 of the liquid collecting plates 2 have an angle within 145 deg. with respect to the axial line 1 of the tower.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a liquid redistributor for a material and / or heat exchange column. The liquid redistributor in the present invention is a column in which a liquid and a gas are countercurrently brought into contact with each other, and is located in the middle stage of the structure to be filled inside the column, and the liquid flowing down from the upper part of the column is It is for redistributing the liquid evenly over the receiving structure and the structure below it, the so-called filler.

[0002]

2. Description of the Related Art In a substance and / or heat exchange column, a liquid to be treated is caused to flow down uniformly from the top of the column onto a packing material filled in the column, while a gas is raised from the bottom of the column. By doing so, a uniform gas-liquid contact between the liquid and the gas is achieved, but as the liquid to be treated flows down the inside of the tower along the packing material, due to the influence of the gas flow from below, etc. The distribution is biased, so that the liquid is not uniformly distributed in the lower part of the tower, and the efficiency of gas-liquid contact deteriorates. Therefore, in the substance and / or heat exchange column, the liquid flowing down from above is received in the middle part of the column filled with the packing material, and the liquid is distributed uniformly over the entire packing material again. It is often practiced to place a liquid redistributor to do this. There are many types of such liquid re-distributors, and their distribution methods are also diverse. As one method, a plurality of V-shaped collecting troughs having a plate (collecting plate) for collecting the liquid are arranged in parallel to the cross section of the tower, and a hole is opened at the center of the collecting troughs. The collected liquid is made to flow down from the hole, and the liquids flowing down from the respective collecting troughs are further collected and made to flow down in a vertical pipe from one place, and a plurality of liquids connected to this vertical pipe and arranged in parallel to the cross-section of the tower. There is a method in which it is distributed on the filler through the nozzle hole of the distribution pipe. The structure of this type of liquid re-distributor will be described in more detail. At the top of the liquid re-distributor, a plurality of collecting troughs, which are formed to be the same as the collecting plates, are arranged. There is a collection trough that collects the liquid that flows down from the hole of the hole, and there is a vertical pipe at the bottom of the collection trough for flowing down the liquid collected in the trough. Distribution pipes are arranged for distribution on the filling material. Since such a liquid re-distributor has such a configuration, the height from the liquid collecting section to the distributing section is the sum of the heights of the respective constituent elements. For this reason, such a liquid redistribution pipe usually requires a considerable height. Especially when the amount of liquid flowing down is large, a certain amount of depth is required for the liquid collecting trough and the liquid collecting trough.
The height of the entire device will be further increased. In addition, in this type of re-distributor, it is important to minimize the area occupied by the cross-sectional area of the tower in order to allow the gas that rises from below to pass smoothly upward when installed in the tower. In the case where a large amount of liquid flows down, the height of the liquid re-distributor must be increased in order to reduce the area occupied by the cross-sectional area of the column. In addition, such a complicated structure of the re-distributor causes a rising pressure loss of gas and is expensive, which is not preferable.
Further, since the height of the liquid redistribution device is required, the height of the column itself increases, which is not preferable.

[0003]

The present inventor has conducted extensive research to overcome the above-mentioned drawbacks of the prior art. As a result, a plurality of liquid collecting plates that are inclined with respect to the column axis are arranged, a groove having an appropriate size is horizontally provided on the upper surface of the liquid collecting plate, and the liquid is collected at the lower end of the liquid collecting plate. By forming a corrugated notch as a means for uniformly dropping over the entire width of the column, the liquid that falls from the upper part of the tower in a non-uniform distribution state is received, and this is moved downward. They have found that they can be evenly distributed and flowed down, and have completed the present invention.

That is, the present invention is installed in the middle part of the substance and / or heat exchange column, receives the liquid to be treated flowing down from the upper part of the column, and transfers the liquid on the packing material below it. A liquid re-distributor for uniformly distributing and supplying over the entire cross section of the tower, the plurality of liquid re-distributors extending in a direction parallel to the cross section of the tower and being mounted at an inclination with respect to the axis of the tower. Of the liquid collecting plate, and the liquid collecting plate has a groove formed generally in a horizontal direction in the cross section of the tower, and at the lower end portion of the liquid collecting plate, the liquid is spread over the entire width of the liquid collecting plate. In the state where the liquid re-distributor is installed in the tower, the means for uniformly dropping the liquid is formed.
The present invention relates to a substance and / or a liquid re-distributor for a heat exchange column, characterized in that an upper surface portion in the vertical direction of most of the grooves of the liquid collection plate has an angle within 145 degrees with respect to the column axis.

The present invention will be described below with reference to examples.

FIG. 1 shows the configuration of one mode of the liquid redistribution device according to the present invention. That is, the liquid re-distributor of the present invention is composed of a plurality of liquid collecting plates 2 arranged so as to be inclined with respect to the column axis 1, and each liquid collecting plate 2 is formed in a horizontal direction generally in the cross section of the column. In the groove 3 and the lower end of the liquid collecting plate, means for dropping the liquid uniformly over the entire width of the liquid collecting plate, for example, a corrugated cut 4 in the embodiment shown in FIG. Has been formed. The plurality of liquid collecting plates 2 are connected by a connecting plate 9.

The flow of the liquid in the liquid re-distributor of the present invention will be described. The liquid flows down from inside the tower in which a structure such as a packing material is arranged, while contacting the structure, from above the tower. , Falling onto the collecting plate of the liquid redistribution device of the present invention. In this case, when the liquid flows downward through the filling material layer, the liquid is unevenly flowed down due to the influence of the gas flow from below and the filling state of the filling material. Come on. As shown in FIGS. 1 and 2, the liquid collecting plates are arranged in the tower with an inclination with respect to the tower axis, so that all the liquid flowing down from above hits the liquid collecting plate. Run down along the top surface of the collection plate.

The liquid flowing down along the upper surface of the liquid collecting plate is laterally diffused by the groove 3 formed on the surface of the liquid collecting plate,
Further, a means for dropping the liquid evenly over the entire width of the liquid collecting plate formed at the lower end portion of the liquid collecting plate, for example, branched by a corrugated cut 4, is provided below the liquid collecting plate. Drop on the filler. As described above, the liquid re-distributor of the present invention laterally diffuses the liquid, and the lateral liquid diffusion is an essential factor for uniform distribution of the liquid. In the liquid re-distributor according to the present invention, the liquid that has fallen from above the tower and hits the liquid collecting plate, when flowing down along the surface from the upper part of the liquid collecting plate, first moves laterally by the first groove. Spread given to spread. As the amount of liquid flowing down increases, the liquid flows down over the first groove and then hits the arranged grooves. Even in this groove, the liquid spreads by getting a lateral diffusion force. In practice, dozens of grooves are arranged on the surface of the liquid collecting plate, and the liquid is continuously diffused in the lateral direction.

The liquid redistributor of the present invention is arranged in the middle stage of the substance and / or heat exchange column. Therefore, a structure such as a packing material for contacting gas and liquid is arranged above the liquid re-distributor, and the liquid supplied from the top of the column drops through the bed of the packing material. As the liquid flows unevenly as it falls through the bed of packing material, the liquid is not evenly distributed, but such non-uniformly falling liquid is collected by the liquid re-distributor of the present invention. It is captured by a plate, the amount of the liquid is made uniform on the liquid collecting plate, and the liquid is dropped onto the filling material further filled below.

The liquid re-distributor according to the present invention is not suitable for completely non-uniform liquid flow. For example, it is virtually impossible to completely collect the liquid when most of the total amount of the liquid flowing down flows down only one wall surface. In using the liquid re-distributor of the present invention, it is necessary that a certain amount of liquid is distributed in the column, and the cross section of the column is 20% to 3%.
In the case where there is a difference in the amount of flowing liquid of about 0%, a sufficient effect is exhibited. In such a case, the liquid that has fallen to any place on the liquid collecting plate is spread laterally by the plurality of rows of grooves formed on the liquid collecting plate, so that the liquid is spread over the entire width of the liquid collecting plate. And averaged to provide a generally uniform redistribution of liquid.

In the liquid re-distributor of the present invention, when the liquid re-distributor is installed in the tower, the liquid collecting plate 2 of the liquid re-distributor is installed.
In most of the grooves 3 formed on the surface of the above, it is necessary that the upper surface portion 5 in the vertical direction has an angle (6) of 145 degrees or less with respect to the tower axis (see FIG. 2). If this angle is 145 degrees or more, that is, it becomes closer to the vertical, the ability to diffuse the liquid in the lateral direction on the collecting plate is significantly reduced. In practice, the angle of the upper surface of the groove with respect to the tower axis is 8
0 ° to 90 ° is preferable, but within 90 °, the distribution of the liquid is affected by the depth of the groove, and when the depth of the groove is deep, the liquid does not accumulate in the groove and flow down. This will cause a problem. In practice, the angle and depth of the upper surface of the groove are determined by the amount of liquid falling from above.

The term "most" means that, in the majority of the grooves formed on the surface of the liquid collecting plate of the liquid re-distributor, the upper surface 5 of the grooves in the vertical direction is 140 degrees or less with respect to the tower axis. In the sense that the upper surface 5 has an angle of 140 degrees or more, even if a part of the groove exists in the whole, there is no problem in achieving the effect of the present invention. is there.

Further, the upper surface portion 5 of the groove 3 in the vertical direction does not have to be a flat surface, and may have a curved surface. In this case, the tangent of any part of the curved surface forming the upper surface portion 5 in the vertical direction of the groove is 14 with respect to the tower axis.
It is necessary to have an angle of 0 degrees or less.

The groove 3 does not have to be a straight line and may meander in a range that does not hinder the lateral diffusion of the liquid. Further, the groove 3 need not be continuous from the side end of the liquid collecting plate 2 to the side end on the opposite side. Further, the ends of the groove may be closed.

The grooves of the liquid collecting plate of the liquid re-distributor according to the present invention can be formed by bending the liquid collecting plate itself in a corrugated manner as shown in FIG. 2, or the surface of the smooth plate is uneven. It is also possible to form such a groove by forming. Alternatively, the groove can be formed by sticking an embossed sheet having irregularities on the surface of a smooth plate.

Further, in the liquid re-distributor according to the present invention, it is necessary to provide the lower end portion of the liquid collecting plate with means for dropping the liquid uniformly over the entire width of the liquid collecting plate. . As such a means, for example, forming a corrugated notch 4 as shown in FIG. 1A at the lower end of the liquid collecting plate can be mentioned. Explaining the function of such means, the liquid diffused and made uniform in the width direction of the liquid collecting plate by the grooves formed on the surface of the liquid collecting plate falls from the lower end of the liquid collecting plate. At this time, unless a means for dropping the liquid uniformly over the entire width of the liquid collecting plate is provided, it is said that the falling point of the liquid is deflected and drifts due to the influence of the gas rising from below. A problem occurs. With this,
At this time, the liquid that has been made uniform on the surface of the liquid collecting plate cannot be dropped evenly downward, and the liquid uniformizing effect of the groove is diminished. Therefore, in the liquid re-distributor according to the present invention, at the lower end portion of the liquid collecting plate, by providing means for uniformly dropping the liquid over the entire width of the liquid collecting plate, the above problems are solved. is doing. For example, as such means, if a corrugated cut 4 is formed at the lower end of the liquid collecting plate (Fig. 1 (a)
When the liquid flows down along the surface of the liquid collecting plate and drops from the lower end portion thereof, the liquid drops from the downward protruding portion of the corrugated cut 4, and the drop point becomes constant. Therefore, the flow of the liquid diffused in the lateral direction on the surface of the liquid collecting plate can be dropped downward while maintaining the diffused state.

As another mode of such means, a liquid branching plate 7 may be provided at the lower end of the liquid collecting plate (see FIG. 3). In this case, it is desirable that the liquid branch plates 7 be formed one by one or several by opening in the opposite direction with the extending direction axis 8 of the liquid collecting plate therebetween. Providing such a liquid branching plate has the effect of making the drop point of the liquid constant as described above, and the following further effects can be obtained. That is, when there is no liquid branching plate, when the liquid flowing down from above along the surface of the liquid collecting plate falls from the lower end of the liquid collecting plate, a liquid film is formed when the liquid amount is large. Although the problem that the dispersion of the liquid is impaired occurs, by providing the liquid branching plate, the liquid film is branched to the left and right, and the dispersion force is improved.

In this case, it is preferable that the adjacent liquid branch plates have an appropriate distance from each other when they are not opened. When the distance is close, a liquid film is likely to be formed between the branch plates even when the branch plate is opened, which is not preferable for liquid distribution.

Further, the tip of the liquid branching plate may be thin. In this way, the liquid can be continuously dropped even when the liquid amount is small.

Here, the alternating opening in the opposite direction will be described. It is preferable that the opening angle be increased as the liquid amount increases. This is because if the angle is small, the liquid film is easily formed. In practice, this angle is preferably about 60 to 120 degrees.

The liquid branch plates may be alternately opened one by one, or may be opened alternately by plural ones. The tip of the liquid branching plate may be round or pointed. The opened liquid guide plate may be curved downward or bent downward.

Further, a liquid guide groove may be formed on the liquid branch plate.

The directions of inclination of the plurality of liquid collecting plates 2 with respect to the tower axis may be symmetrically opposite to each other from the center of the tower (FIG. 1 (b)), or may be the same direction ( Figure 1
(c)) Alternatively, each of the liquid collecting plates 2 may be inclined in the opposite direction.

As another aspect of the liquid redistribution device of the present invention,
As shown in FIG. 4, an arbitrary portion of the liquid collecting plate may be bent horizontally in the extending direction of the liquid collecting plate to form the shelf 10. By doing so, since it is possible to form the shelf 10 having an angle smaller than the inclination angle of the liquid collecting plate with respect to the column axis, the liquid flowing down from above the liquid collecting plate has a flow velocity at this shelf. It will be slower and lateral diffusion will be further promoted. Due to the implementation, the angle of the tray with respect to the tower axis is 90.
It is preferably about the degree. The width of the shelves is at least 10
A thickness of at least mm is preferable for diffusing the liquid. The shelf portion may have a flat shape or a curved shape. Further, a plurality of shelves may be arranged on the liquid collecting plate. When the angle of the shelf with respect to the tower axis is within 90 degrees, the liquid flows to the left and right of the collecting plate and is easier to flow than the left and right ends. Cover 11
Can be provided.

[0025]

According to the liquid redistributor of the present invention, it is possible to efficiently re-diffuse / re-distribute a liquid in a substance and / or a heat exchange column with a simple structure and a small height.

Embodiments of the present invention are as follows.

1. The material and / or heat exchange column is installed in the middle part of the column and receives the liquid to be treated flowing down from the upper part of the column, and the liquid is placed on the packing material thereunder and over the entire cross section of the column. A liquid re-distributor for uniformly distributing and supplying the liquid across the column, which is composed of a plurality of liquid collecting plates that extend in a direction parallel to the cross section of the column and are attached at an angle to the column axis. , A groove formed generally in a horizontal direction in the cross section of the tower, and at the lower end portion of the liquid collecting plate, for uniformly dropping the liquid over the entire width of the liquid collecting plate. In the state in which the means is formed and the liquid re-distributor is installed in the tower, the upper surfaces of most of the grooves of the liquid collecting plate in the vertical direction are 145 relative to the tower axis.
A substance characterized by having an angle within degrees and /
Or a liquid re-distributor for a heat exchange tower.

2. The liquid branch plate formed by opening one by one or several sheets in opposite directions with the direction axis of the liquid collecting plate sandwiched therebetween is attached to the lower end of the liquid collecting plate. Liquid redistributor.

3. The above-mentioned item 1 or 2 wherein an arbitrary portion of the liquid collecting plate is bent substantially horizontally in the extending direction of the liquid collecting plate to form a shelf portion having a predetermined angle with respect to the surface of the liquid collecting plate.
The liquid redistribution device according to the item.

4. The liquid distributor according to the above item 3, wherein covers are attached to the left and right ends of the liquid collecting plate.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a liquid redistribution device of the present invention. a is a perspective view showing a state in which a liquid redistribution device according to an aspect of the present invention is installed in a tower, and b and c are side sectional views showing an arrangement state of liquid collecting plates.

FIG. 2 is an enlarged view showing a cross section of a liquid collecting plate of the liquid redistribution device of the present invention.

FIG. 3 is a view showing another embodiment of the liquid collecting plate of the liquid redistribution unit according to the present invention, in which the liquid branching plate is attached to the lower end portion of the liquid collecting plate.

FIG. 4 is a view showing another aspect of the liquid collecting plate of the liquid redistribution unit according to the present invention. a is a figure which shows the aspect which bent a part of liquid collecting plate and formed the shelf part, b is sectional drawing of the liquid collecting plate of such an aspect, c is a side edge part of a shelf part, and is covered. It is a figure which shows the aspect which formed the.

[Explanation of symbols]

 1 Tower axis 2 Liquid collecting plate 3 Groove 4 Corrugated notch 5 Upper surface part in the vertical direction of the groove 6 Angle formed by the upper surface part of the groove in the vertical direction with the tower axis 7 Liquid branch plate 8 Directional axis 9 Plate for connecting 10 Shelf Step 11 cover

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area F28F 25/04

Claims (3)

[Claims] 1. A material and / or heat exchange column is installed in the middle part of the column, receives the liquid to be treated flowing down from the upper part of the column, and deposits the liquid on the packing material below it. A liquid re-distributor for uniformly distributing and supplying over the entire cross-section portion, the plurality of liquid collecting plates extending in a direction parallel to the cross-section of the column and mounted obliquely with respect to the column axis. The liquid collecting plate has a groove formed generally in a horizontal direction in the cross section of the tower, and the liquid is evenly distributed over the entire width of the liquid collecting plate at the lower end of the liquid collecting plate. Means for dropping the liquid into the column, and in the state where the liquid re-distributor is installed in the tower, the upper surface in the vertical direction of most of the grooves of the liquid collecting plate is within 145 degrees with respect to the tower axis. Substances characterized by having an angle and / or liquid subdivision for heat exchange columns Distributor. 2. A liquid branching plate formed by opening one by one or several by opening in opposite directions with a direction axis of the liquid collecting plate sandwiched therebetween, being attached to a lower end portion of the liquid collecting plate. Item 2. The liquid redistribution device according to item 1. 3. The shelf portion having a predetermined angle with respect to the surface of the liquid collecting plate is formed by bending an arbitrary portion of the liquid collecting plate substantially horizontally in the extending direction of the liquid collecting plate. Liquid re-distributor as described.