JP3950321B2 - Gas-liquid contact device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas-liquid contact device used for separation, mixing, reaction, absorption, evaporation, humidity control, cooling, heating, etc. of gas and liquid belonging to mass transfer operation.
[0002]
[Prior art]
For example, various treatment apparatuses for treating harmful substances such as waste water, gas, and groundwater (contaminated) discharged from factories by gas-liquid contact have been put into practical use and are in operation.
[0003]
FIG. 5 is a schematic configuration diagram in which a part of a casing of a conventional gas-liquid contact device is broken.
In FIG. 5 , reference numeral 1 denotes a gas-liquid contact device, which is composed of a cylindrical casing 2 and two elements 3.
Each element 3 includes a mandrel 4 and a plurality of blades 5 having one end fixed around the mandrel 4 and the other end fixed to the inner peripheral surface of the casing 2.
The mandrel 4 is integrally connected by a connecting rod 6 in a uniaxial manner.
[0004]
A processing gas such as ammonia gas (NH ₃ ) is sent into the gas-liquid contact device 1 with a blower or the like, and a neutralizing liquid as a cleaning liquid such as a sulfuric acid aqueous solution (H ₂ SO ₄ ) is co-flowed from the spray tube, or When spraying in a counter-current direction so that the pH of the cleaning liquid becomes 7, ideal gas-liquid contact is made by the air flow and liquid stream colliding with the blades 5 of the element 3 and suddenly changing direction. Can handle harmful substances.
[0005]
[Problems to be solved by the invention]
Since the conventional gas-liquid contact device 1 uses the mandrel 4 to support and fix one end of a large number of blades 5, the diameter of the mandrel 4 is large, that is, the cross-sectional area of the mandrel 4 is increased. Since the cross-sectional area of 2 cannot be effectively used and the efficiency of gas-liquid contact is reduced, the gas-liquid contact device 1 becomes large when attempting to improve the gas-liquid contact efficiency.
[0006]
Further, since the interval between the blades 5 is narrow in the vicinity of the mandrel 4 and wide in the vicinity of the casing 2, the gas-liquid flow rate increases in a hyperbolic shape from the vicinity of the mandrel 4 toward the vicinity of the casing 2. Must be arranged in multiple stages, and the gas-liquid contact device 1 becomes large.
[0007]
The present invention has been made to solve the above-described disadvantages, and can be miniaturized by improving the gas-liquid contact efficiency by effectively utilizing the cross-sectional area of the casing. Is to provide.
[0008]
[Means for Solving the Problems]
The gas-liquid contact device according to the present invention includes a cylindrical casing and a section of the casing that intersects the shaft divided into a plurality of portions in the circumferential direction, arranged in contact with each other, and attached to each frame in the casing. And a plurality of blades arranged in parallel so as to generate a swirling flow by intersecting a cross section of the casing orthogonal to the predetermined angle, and a plurality of elements are arranged in the axial direction of the casing. The direction of the swirl flow is reversed , the process gas is fed into the casing from the lower side, and the cleaning liquid is sprayed into the casing from the upper side, so that the air flow and the liquid flow collide with the blades from the opposite directions. The part of the cleaning liquid that is falling from the blades is wound up by the airflow, becomes a vortex, rises along the blades, turns into a swirling flow at the upper end of the blades, In which the gas-liquid contact is made causing the grayed.
It is desirable to provide a plurality of openings in each blade.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram in which a casing of a gas-liquid contact device according to an embodiment of the present invention is partially broken, FIG. 2 is a sectional view taken along line XX in FIG. 1, and FIG. line, B-B line, C-C line cross-sectional view of the element according to line D-D, Fig. 4 is an operation explanatory diagram.
Note that some of the slits provided on the blades are shown in FIG. 2 and omitted in FIG.
[0010]
In these drawings, reference numeral 11 denotes a gas-liquid contact device, which is composed of a cylindrical casing 12, for example, a rectangular cylindrical casing 12, and two elements 13 arranged in the casing 12 in the axial direction.
Each element 13 has a rectangular frame 14 </ b> A to 14 </ b> D that is attached to the casing 12 by dividing the section of the casing 12 orthogonal to the shaft into four in the circumferential direction and arranged so as to contact each other. In 14A-14D, it is comprised with the several blade | wing 15 attached so that the cross section of the casing 12 orthogonal to an axis | shaft might be crossed by a predetermined angle and a swirl flow may be generated.
The blade 15 is provided with a plurality of slits 15s as openings.
The vertically adjacent elements 13 are arranged so that the direction of the swirl flow is opposite.
[0011]
Next, the operation will be described.
First, a processing gas such as ammonia gas (NH ₃ ) is sent from the lower side into the gas-liquid contact device 11 with a blower or the like, and a sulfuric acid aqueous solution (H ₂ So ₄ ) as a cleaning liquid is supplied from the spray tube into the gas-liquid contact device 11. As shown in FIG. 4 , in the gas-liquid contact device 11, the air current and the liquid flow collide with the blades 15 in the opposite directions and suddenly change direction. change.
At this time, a part of the neutralizing liquid falling from the blade 15 is rolled up, becomes a vortex and rises along the blade 15, and ideal gas-liquid contact is performed.
In addition, gas-liquid contact is performed by entraining the neutralizing liquid falling from the blade 15 at the upper end of the blade 15.
[0012]
And the bubble rolled up by the airflow turns into a swirl flow at the upper end of the blade 15, causing intense bubbling, and more effective gas-liquid contact than parallel flow is performed.
The neutralized liquid that has not been mixed in the vortex flows along the blade 15 and enters the vortex on the back side of the blade 15 through the slit 15s, and gas-liquid contact is performed.
Further, harmful mist adheres to the inner surface of the casing 12 and is discharged as a water film flow.
Note that similar gas-liquid contact is also performed in the other elements 13.
[0013]
As described above, according to one embodiment of the present invention, the casing 12 that intersects the axis is divided into a plurality of sections in the circumferential direction, arranged in contact with each other, and installed in the casing 12. Further, a plurality of elements 13 having a plurality of blades 15 attached in parallel so as to cross a section of the casing 12 orthogonal to the axis at a predetermined angle to generate a swirling flow are arranged in the axial direction of the casing 12 and adjacent to each other. Since the direction of the swirl flow between the elements 13 is reversed, the flow resistance of the elements 13 becomes uniform.
[0014]
Since the flow resistance of the element 13 becomes uniform in this way, the gas-liquid can be brought into uniform contact by effectively using almost the entire area of the cross section of the casing 12, so that the gas-liquid contact efficiency is improved. As a result, the gas-liquid contact device 11 can be miniaturized.
In addition, since the blade 15 is provided with a plurality of slits 15s so that the cleaning liquid can be moved from one surface of the blade 15 to the other surface, the cleaning liquid or the like can be effectively used to improve the gas-liquid contact efficiency.
[0015]
In the above embodiments, the example in which the element 13 has two and placing into the casing 12, the element 13 but it may also be three or more.
[0016]
【The invention's effect】
As described above, according to the present invention, the section of the casing that intersects the axis is divided into a plurality of sections in the circumferential direction, arranged in contact with each other, and installed in the casing. A plurality of elements in which a plurality of blades are mounted in parallel so as to cross the cross section at a predetermined angle to generate a swirl flow are arranged in the axial direction of the casing, and the swirl flow direction between adjacent elements is reversed. Therefore, the distribution resistance of the element becomes uniform.
[0017]
By making the flow resistance of the element uniform in this way, it is possible to make the gas-liquid contact uniformly by effectively utilizing almost the entire cross-section of the casing, thereby improving the gas-liquid contact efficiency. The gas-liquid contact device can be miniaturized.
Further, since each blade is provided with a plurality of openings so that the cleaning liquid can be moved from one surface of the blade to the other surface, the cleaning liquid or the like can be effectively used to improve the gas-liquid contact efficiency.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram in which a part of a casing of a gas-liquid contact device according to an embodiment of the present invention is broken.
2 is a cross-sectional view taken along line XX of FIG.
3 is a cross-sectional view of each element taken along line AA, BB, CC, and DD in FIG. 2;
FIG. 4 is an operation explanatory diagram.
FIG. 5 is a schematic configuration diagram in which a casing of a conventional gas-liquid contact device is partially broken.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gas-liquid contact apparatus 2 Casing 3 Element 4 Mandrel 5 Blade 6 Connecting rod 11 Gas-liquid contact apparatus 12 Casing 13 Element 14A-14D Frame 15 Blade 15s Slit

Claims (2)

A cylindrical casing;
The casing crossing the axis is divided into a plurality of sections in the circumferential direction, arranged in contact with each other, and installed in the casing so as to cross the casing crossing perpendicular to the axis at a predetermined angle. An element having a plurality of blades attached in parallel to generate a swirling flow;
While arranging a plurality of the elements in the axial direction of the casing, the direction of the swirl flow between the adjacent elements is reversed ,
The process gas is fed into the casing from the lower side and the cleaning liquid is sprayed into the casing from the upper side, so that the airflow and the liquid flow collide with the blades from opposite directions and change directions, and fall from the blades. A portion of the washing liquid that is about to be swung up by the airflow, becomes a vortex and rises along the blade, turns into a swirling flow at the upper end of the blade, causes bubbling, and gas-liquid contact is performed,
The gas-liquid contact apparatus characterized by the above-mentioned. In the gas-liquid contact device according to claim 1 ,
Provided a plurality of openings in each blade,
The gas-liquid contact apparatus characterized by the above-mentioned.

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