JPH10325694A - Straightener for liquid distributor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make uniform the flow rate of liquid being delivered from each nozzle hole of a liquid distributor by disposing a straightener, comprising a straightener body having a plurality of liquid delivery holes in the lower surface and a partitioning plate arranged in the intermediate stage section of the body, above the liquid distributor. SOLUTION: A straightener 10 comprises a trough-like body stretching in the horizontal direction, and a partitioning plate arranged therein. The body is provided with liquid delivery holes 13 in the lower surface and the partitioning plate 12 is provided with liquid flow-down holes 14. The straightener 10 is disposed above the main trough 21 of a liquid distributor 20 substantially in parallel therewith. A liquid flow introduced into the straightener 10 from the upper surface release part of the straightener body is developed laterally along a first channel defined by the partitioning plate 12 and then flows down through the hole 14. Subsequently, it is developed laterally along a second channel defined by the bottom face of the body and then flows down through the hole 14. Since the liquid flow flows down uniformly into the main trough 21 of the liquid distributor 20, flow rate of the liquid into each distribution tube 22 and from each nozzle 24 is made uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a substance and / or a heat exchange tower in which a liquid and a gas are brought into countercurrent contact with each other and / or a heat exchange tower. More particularly, the present invention relates to a rectifier for pre-rectifying a liquid flow supplied to such a liquid distributor.

[0002]

2. Description of the Related Art
There are many types of liquid distributors used in mass and / or heat exchange towers, and their distribution methods are also various, but most of them have a liquid flowing down from above and distributing it horizontally. , And of a type that flows down further. As a method of distributing the liquid in the horizontal direction and then flowing downward, a plurality of liquid distribution pipes are arranged in parallel with the tower section, nozzle holes are provided at intervals below the distribution pipe, and the liquid is supplied from the nozzle holes. Or a method in which a nozzle hole is provided at an interval above the distribution pipe, and the liquid overflows from the nozzle hole. As another distribution method, a plurality of U-shaped troughs are provided in parallel with the tower cross section, and the trough distributes the liquid in a horizontal direction, and the liquid overflows from a notch (notch) provided at an upper part of the trough. There is a way to make it flow. Also,
In a large-diameter tower, a plurality of liquid distributors as described above are arranged side by side, and the liquid distributors are connected by pipes or troughs to distribute the liquid evenly to each liquid distributor. It is also often done.

FIG. 10 shows an example of a liquid distributor of the type in which liquid is horizontally distributed by a liquid distribution pipe. The liquid distributor shown in FIG. 10 has a vertical pipe 1 through which a liquid flows down from above, a main pipe 2 connected to the vertical pipe and arranged horizontally, and a horizontal pipe connected to the main pipe and connected horizontally. It is composed of a plurality of distribution pipes 3. The liquid flows from the vertical pipe 1 to the main pipe 2
Then, it is branched into each distribution pipe 3 and flows down from a nozzle hole 4 formed in each distribution pipe onto a filler disposed below. In this type of liquid distributor, the amount of liquid flowing out of a nozzle hole formed in the distribution pipe is
It is determined by the head of liquid accumulated in the vertical pipe or main pipe and the diameter and number of nozzle holes. Among these, the head is treated as a variable when the distributor is actually used, and the liquid fluctuates due to the fluctuation of the head during use. When the water head is high, the flow rate of the liquid increases, and when the water head is low, the flow rate decreases, and accordingly, the amount of liquid flowing out of each nozzle hole also increases or decreases. However, in the conventional distributor, when the flow of the liquid is converted from the vertically downward flow in the vertical pipe to the horizontal horizontal flow in the main pipe, the flow is disturbed at the connection between the vertical pipe and the main pipe. And a vortex is generated, which causes a pressure fluctuation, resulting in a non-uniform amount of liquid distributed to each distribution pipe and a non-uniform amount of liquid flowing out of each nozzle hole. . Further, when the water head changes due to a change in the amount of liquid during use, the problem that the flow rate from each nozzle hole becomes non-uniform has become prominent. This is because the flow of the liquid in the main pipe is disturbed by the change in the water head, and as a result, the amount of liquid flowing through each distribution pipe and the amount of liquid flowing out of each nozzle hole become uneven. In particular, when the nozzle hole is arranged on the lower surface of the distribution pipe, the liquid is more likely to flow out of a portion closer to the vertical pipe, and particularly when the water head is lowered, the nozzle of the distribution pipe closer to the vertical pipe is used. Outflow of the liquid only from the hole often causes a problem that the outflow of the liquid is virtually not observed from the nozzle hole of the distribution pipe far from the vertical pipe. When such a problem occurs, the liquid flow distribution in the packed tower becomes non-uniform, which causes a problem that efficient contact between gas and liquid is hindered.

[0004] This phenomenon is caused by causing the liquid to flow laterally by means of a U-shaped trough, causing the liquid to overflow from a notch (notch) formed at the top of the trough side wall, or to flow out from a hole arranged on the side surface of the trough. This also occurs in a distributor of the type in which the liquid flowing down from above or the liquid flowing in from the side collides with the liquid in the trough, causing the liquid level to fluctuate. As a result, there is also a problem that the flow in the trough is disrupted.

The present inventor has conducted extensive research to overcome the above-mentioned disadvantages of the prior art. As a result, in a liquid distributor using a U-shaped trough as a main trough as shown in FIG. 2, a liquid rectifier for uniformly supplying liquid over substantially the entire length of the main trough is provided above the main trough. , The liquid flow from above is first spread uniformly in the rectifier in the lateral direction, and then supplied to the main trough to make the distribution of the liquid flow in the main trough uniform. The present inventors have found that the amount of liquid supplied to the distribution pipe and the amount of liquid flowing out from each nozzle hole formed in each distribution pipe can be made uniform, and the present invention has been completed.

That is, the present invention provides a method for distributing liquid across a cross-sectional portion of a column of material and / or heat exchange via a tube or trough disposed along the cross-section of the column within the column. A liquid distributor rectifier for guiding a liquid flow to a liquid distributor to be supplied, and a horizontally extending tubular or trough-shaped main body having a plurality of liquid outflow holes formed in a lower surface thereof.
And a rectifier for a liquid distributor, which is disposed substantially horizontally inside a middle portion of the main body, and is constituted by at least one partition plate member having a plurality of liquid flow holes and / or cuts formed therein. .

Another aspect of the invention is directed to a cross section of a column of a material and / or heat exchange tower via a tube or trough disposed along the cross section of the tower. A main trough extending in the horizontal direction, and connected to the main trough, extending in the horizontal direction and having one or more nozzle holes for liquid outflow or liquid overflow. A rectifier for a liquid distributor as described above, which is arranged substantially parallel to the main trough above the main trough. About the vessel.

Hereinafter, a rectifier for a liquid distributor and a liquid distributor according to the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a rectifier 10 for a liquid distributor according to one embodiment of the present invention. Rectifier 10 shown in FIG.
Is a trough-shaped body 11 extending in the horizontal direction, and
It is composed of a partition plate 12 arranged inside the middle section of the main body. A hole 13 for liquid outflow is formed in a lower surface of the main body 11. The partition plate 12 also has a hole 14 for flowing down the liquid. The liquid flow guided into the rectifier 10 from the upper open portion of the trough-shaped rectifier body is first developed laterally along the first flow path formed by the partition plate 12, and then formed on the partition plate 12. It flows down from the hole 14 formed. The liquid that has flowed down is then received by the second flow path formed by the bottom surface of the main body 11, and after being developed along the flow path, flows down below the hole 13 formed in the lower surface of the main body 11. I do. Thus, by forming two flow paths in liquid communication with each other in the rectifier, the liquid flow guided into the rectifier is developed over the entire length in the first flow path and the second flow path. As a result, it flows down from the hole 13 after being distributed uniformly over the entire length of the rectifier. Thereby, each hole 13
, A uniform amount of liquid flow can be supplied downward.

FIG. 2 is a diagram showing one embodiment of a liquid distributor used in combination with the rectifier of the present invention. The liquid distributor 20 shown in FIG. 2 has a main trough 21 extending in the horizontal direction.
And a distribution pipe 22 that is connected across the main trough and extends in the horizontal direction. A nozzle hole 24 for liquid outflow is formed at the top of the distribution pipe. The operation of the liquid distributor will be described. The liquid flow introduced into the main trough 21 is developed in the main trough 21 along the length direction of the main trough, and the liquid flows from the connection portion 23 to each distribution pipe. It flows to the pipe 22 and flows downward from the nozzle hole 24 formed in the distribution pipe. In such a liquid distributor,
If the supply flow rate of the liquid flow to the main trough fluctuates or the flow rate is small, the amount of liquid supplied to each distribution pipe will be uneven, and in some cases, the distribution pipe that is furthest from the liquid supply point May not be supplied at all.

FIG. 3 shows the rectifier of the present invention shown in FIG.
It is a figure which shows the state attached to the liquid distributor shown in FIG. The rectifier 10 of the present invention is disposed above the main trough 21 of the liquid distributor 20 and substantially parallel to the main trough. The liquid supplied from above is first guided into the rectifier, spread uniformly over the entire length in the rectifier as described above, and then flows down uniformly into the main trough from the hole 13 at the lower part of the rectifier body. I do. Thereby, the distribution of the liquid flow in the main trough 21 of the liquid distributor becomes uniform over the entire length of the main trough, whereby the flow rate of the liquid flow to each distribution pipe 22 and the liquid flow from each nozzle hole are reduced. The problem that the volume becomes uniform and the distribution of the liquid becomes uneven due to the fluctuation of the flow rate of the liquid flow is solved.

As shown in FIG. 1, holes 14 are formed in the partition plate 12.
And forming a notch (notch) 15 at the edge of the partition plate 12 as shown in FIG. 4 instead of, or in combination with, allowing the liquid to flow down from the hole to the second flow path, The liquid may flow downward from this notch.

The number and size of the holes 14 and / or notches 15 formed in the partition plate 12 are determined by the partition plate 12 while allowing an appropriate amount of liquid to flow down to the second flow path formed by the bottom surface of the rectifier main body. The liquid is spread to the vicinity of the end of the rectifier by the first liquid flow path, and the liquid flow is uniformly spread over the entire length in the second flow path formed by the bottom surface of the rectifier body. It can be empirically determined in consideration of the relationship between the flow amount of the liquid and the size of the rectifier so that the liquid flows down uniformly from each of the holes 13.

Further, instead of or in addition to forming the holes 14 and / or the notches 15 in the partition plate 12, the width and / or length of the partition plate is made slightly smaller than the width and length of the rectifier body. Thus, a gap may be provided between the partition plate and the inner wall surface of the rectifier body, and the liquid may flow down through the gap. The appropriate size of the gap in this case is determined empirically, taking into account various parameters, as well as the number and size of the holes and / or notches described above. In addition, the partition plate does not need to be configured by one member, and may be configured by combining a plurality of members. In this case, a gap may be provided between each member as long as the liquid flow is spread over the entire length of the rectifier.

The plate material forming the partition plate material 12 is not limited to a flat plate shape as shown in each figure, but a V-shaped, semicircular, corrugated plate material can be used as the partition plate material. Those skilled in the art will readily understand.

As shown in FIG. 5A, the rectifier and the liquid distributor are arranged such that the width of the rectifier main body 11 is substantially equal to the width of the main trough 21 of the liquid distributor, and the rectifier is disposed immediately above the main trough. Alternatively, as shown in FIG. 5B, the width of the rectifier body 11 may be slightly smaller than the width of the main trough 21 so that the rectifier body is arranged to be inserted into the main trough 21. In the latter case, the hole 13 formed in the lower part of the main body of the rectifier 10 may be formed in the bottom part of the main body, or, as shown in FIG. It can also be formed at a lower position.

It is to be noted that, if necessary, the holes 13
As shown in FIG. 6, a pipe 17 for bleeding air is arranged on a part of the partition plate 12 to make the flow of the liquid from the rectifier body to the second flow path formed by the bottom surface of the rectifier smooth. Can be.

The shape of the rectifier body may be a trough shape having an open upper surface as shown in FIG. 1, or a tube shape having a vertical tube 30 connected to the upper portion as shown in FIG. You may. When the rectifier body is trough-shaped, the liquid is guided to the rectifier by disposing the tip of a liquid guide tube (not shown) preferably directly above or in the trough of the trough-shaped rectifier body, This is performed by flowing the liquid into the trough from the tip of the liquid guide tube. In this case, the liquid flow in the first flow path of the rectifier is disturbed by the liquid flow discharged from the liquid guiding pipe, and the liquid overflows from the upper end of the trough, or the liquid flow from the liquid guiding pipe is changed to the upper end of the trough. A cover for preventing liquid scattering may be arranged on the upper surface of the trough other than where the liquid guide tube is arranged so that the liquid guiding tube is not scattered.

As another embodiment, as shown in FIG. 8, two dam members 18 are arranged at the center of the partition plate member 12, and a hole for liquid flow is not formed between the dam members 18. Can also be configured. In this case, when the liquid flow from above is caused to flow down to the portion between the weir members 18, the liquid flow first stays at the portion between the weir members 18, and then overflows the outside of the weir member beyond the weir member 18. After flowing, it flows on the partition plate 12 and flows down from the hole 14. With such a configuration,
Since the liquid flow first stays between the weir members and then flows out onto the first flow path formed by the partition plate material, the liquid flow from the upper part flows down directly onto the first flow path. Since the dynamic pressure of the liquid flow can be reduced, it is possible to further suppress the turbulence of the liquid flow flowing over the first flow path formed by the partition plate member, and to promote uniform spreading of the liquid.
Further, as shown in FIG. 9, a cylindrical member 19 may be arranged at the center of the partition plate member 12, and the hole 14 may not be formed in a portion inside the cylindrical member. In this case, by causing the liquid flow from above to flow down inside the cylindrical member 19, the same effect as the configuration of the embodiment shown in FIG. 8 can be obtained.

The vertical position when the partition plate is placed in the body of the rectifier can be appropriately determined depending on the expected flow rate of the liquid to be induced, the size of the rectifier body, the size of the holes, and the like. In general, when the main body is trough-shaped and the cover for preventing liquid scattering as described above is not used, a sufficient vertical distance from the upper end of the main body trough to the partition plate member is used, and It is desirable to prevent scattering and overflow of the liquid.

In the liquid rectifier of the present invention, a plurality of partition plate members 12 can be arranged vertically. When two or more partition plates are arranged, the flow path formed by the first partition plate suppresses the turbulence of the liquid flow and achieves a uniform liquid distribution over the entire length of the rectifier. Further, since the turbulence of the liquid flow is suppressed to achieve a uniform liquid distribution, a more uniform distribution of the liquid flow can be achieved over the entire length of the rectifier.

The rectifier can be attached to the main trough of the liquid distributor by connecting it with a connecting member 16 as shown in FIGS. 3 and 5, for example, or separately from the liquid distributor. It can also be installed independently on the inner wall. In the latter case, since the liquid distributor and the rectifier can be separately incorporated in the packed tower, the work at the time of installation can be made more flexible. In addition, a cylindrical guide member may be attached to a portion of the liquid outflow hole at the lower part of the rectifier body to guide the liquid flow flowing down from the rectifier into the main trough of the liquid distributor. Further, by attaching a cover to the upper open surface of the main trough of the liquid distributor except for a position corresponding to the hole in the lower part of the rectifier body, the liquid that falls from the rectifier into the main trough of the liquid distributor is introduced into the trough. It is possible to prevent the existing liquid flow from colliding with the liquid surface and flying outside the trough. Further, the rectifier described so far is of a type in which the liquid falls into a main trough of a liquid distributor disposed below from a hole formed in a lower part of the rectifier body, but a pipe is used instead of the main trough. When using a liquid distributor in which the main pipe of the shape is arranged,
By forming a hole in the upper surface of the main pipe and connecting the hole in the lower part of the rectifier main body and the hole in the upper surface of the main pipe with a pipe, the rectifier and the liquid distributor can be in liquid communication.

[0023]

As described above, when the liquid rectifier according to the present invention is used in combination with the liquid distributor, the rectifier allows the liquid to be uniformly distributed in advance over the entire length of the main trough (or main pipe) of the liquid distributor. Since the liquid can be supplied to the main trough (or main pipe) of the liquid distributor after the distribution of the liquid, the problem of non-uniform liquid flow distribution due to an increase or decrease in the liquid flow rate can be effectively prevented. The industrial value is great because, under any conditions, the liquid can be evenly distributed throughout the packed column, and efficient contact between gas and liquid can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a rectifier according to one embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a liquid distributor that can be used in combination with the rectifier according to the present invention.

FIG. 3 is a diagram showing a mode in which the rectifier of the present invention shown in FIG. 1 and the liquid distributor shown in FIG. 2 are connected.

FIG. 4 is a perspective view showing a rectifier according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a connection state between the rectifier of the present invention and a liquid distributor. FIG. 5a shows the rectifier mounted on top of the main trough of the liquid distributor, FIG. 5b
FIG. 4 is a view showing a mode in which a rectifier is arranged so as to be inserted into a main trough of a liquid distributor.

FIG. 6 is a perspective view showing a rectifier according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a rectifier according to another embodiment of the present invention.

FIG. 8 is a perspective view showing a rectifier according to another embodiment of the present invention.

FIG. 9 is a perspective view showing a rectifier according to another embodiment of the present invention.

FIG. 10 is a diagram showing a configuration of a general liquid distributor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rectifier 11 Rectifier main body 12 Partition plate 13 Hole 14 Hole 15 Notch 16 Connection member 17 Air vent pipe 18 Weir member 19 Cylindrical member 20 Liquid distributor 21 Liquid distributor main trough

Claims (10)

[Claims] 1. Liquid distribution for distributing liquid in a mass and / or heat exchange column via a tube or trough arranged along the cross section of the column over the cross section of the column. A rectifier for a liquid distributor for guiding a liquid flow to a vessel, a horizontally extending tube-shaped or trough-shaped main body having a plurality of liquid outflow holes formed in a lower surface thereof, and a middle part of the main body. 1. A rectifier for a liquid distributor, comprising: at least one partition plate disposed substantially horizontally therein and having a plurality of liquid flow-down holes and / or cuts formed therein. 2. The rectifier according to claim 1, wherein a gap is formed between an edge of the partition plate and an inner wall surface of the rectifier body. 3. The rectifier according to claim 1, wherein the partition plate comprises a plurality of members. 4. The rectifier according to claim 1, wherein a pipe for venting air is attached to the partition plate. 5. The rectifier according to claim 1, wherein two or more partition plate members are vertically spaced. 6. A trough having an open upper surface, and a cover for preventing liquid scattering is attached to an upper surface of the trough except at one or more places where a tip portion of the liquid guide tube is disposed. The rectifier according to claim 1, wherein 7. The rectifier according to claim 1, wherein the main body has a tubular shape, and a vertical pipe for guiding liquid is connected. 8. A liquid distribution system for distributing liquid within a column of a mass and / or heat exchange column via tubes or troughs arranged along the cross section of the column and across the cross section of the column. A main trough extending in the horizontal direction, and one or more nozzle holes for liquid outflow or a notch for liquid overflow formed connected to the main trough and extending in the horizontal direction. A liquid distributor, comprising a pipe or a distribution trough, wherein the rectifier for a liquid distributor according to claim 1 is disposed substantially parallel to the main trough above the main trough. 9. The liquid distributor according to claim 8, wherein the bottom surface of the rectifier main body is arranged so as to be inserted into the main trough of the liquid distributor. 10. Liquid distribution for distributing liquid in a mass and / or heat exchange tower via a tube or trough arranged along the cross section of the tower over the cross section of the tower. A main pipe extending in the horizontal direction, and a distribution pipe or a cross pipe connected to the main pipe and extending in the horizontal direction and having at least one notch for liquid outflow or a notch for liquid overflow. 2. A distributing trough, above the main pipe.
The rectifier for a liquid distributor described in (1) is arranged substantially in parallel with the main pipe, and a guide pipe for guiding liquid into the main pipe from a liquid outlet hole formed in a lower surface of the main body of the rectifier is arranged. A liquid distributor characterized by the above-mentioned.