JP2000350929A - Two-part liquid mixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly efficiently mix and bring two liquids into contact with each other by intermingling super fine bubbles using a simple process. SOLUTION: In the two-part liquid mixing device which mixes a first liquid 11 with a second liquid 12, a liquid chamber for allowing passage of the first liquid 11, a gas chamber 3a positioned adjacently to the liquid chamber through a porous partition 6a, a means to supply a pressurized gas to the gas chamber 3a and a means 5 to atomize a second liquid 12 to the gas chamber 3a, are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-liquid mixing device for mixing a liquid and a liquid.

[0002]

2. Description of the Related Art Conventionally, as a device for mixing two liquids, a mixer having a rotary stirrer in a fixed container, a mixer having a rotary container, a mixer having an oscillating vibration mechanism, There are mixers that combine mixers, etc.
How to mix evenly, how to mix without air, how to mix to include air, how to make a mixed solution that does not change with time, how to adjust the mixing ratio of the two solutions Improvements and design changes have been made from various viewpoints such as the above, and devices corresponding to the liquid to be mixed and to the mixed liquid have been considered.

[0003] Incidentally, some devices for mixing two liquids do not merely mix, but also those that cause a reaction between the two liquids, those that further contact a gas between the two liquids, or those that simply contact the liquids. Not only that, there is a substance accompanied by mass transfer, such as moving a substance on the gas side to the liquid side, and conversely, moving a substance on the liquid side to the gas side. For example, in the environmental field, it is used for environmental equipment such as deep aeration equipment, chlorine disinfection equipment for water, and waste liquid treatment equipment; in the food industry, for the manufacturing process of soft drinks such as carbonated water; and in the petrochemical industry, it is used for oxidation. 2. Description of the Related Art There is an apparatus that mixes a liquid and a gas in a wide range with a reaction apparatus, a hydrogenation reaction apparatus, or the like, and performs mixing with mass transfer or chemical reaction.

[0004]

However, in a conventional liquid / gas contact mixing apparatus such as an aeration tank or a static mixer, the mixing contact ratio of the liquid to the liquid and the liquid to the gas when the liquid has a large capacity. In a device having a rotary stirrer, the mixing contact ratio can be increased to some extent, but there is a problem in that the power cost is high. Further, in an apparatus using a nozzle that sprays fine gas, troubles such as clogging and clogging of the nozzle occur, and there is a problem that equipment costs and maintenance management costs are high.

The present invention has been made in view of the above points, and provides a two-liquid mixing apparatus capable of mixing and contacting two liquids with high efficiency by mixing ultra-fine bubbles by a simple method. As an issue.

[0006]

According to the present invention, there is provided a two-liquid mixing apparatus for mixing a first liquid and a second liquid, wherein the first liquid is passed through the two-liquid mixing apparatus. A liquid chamber, a gas chamber adjacent to the liquid chamber via a porous partition, means for supplying a pressurized gas to the gas chamber, and means for supplying the second liquid to the gas chamber. It is characterized by comprising.

In this two-liquid mixing apparatus, the liquid chamber is formed of a monohedron or a polyhedron having a curved surface or a flat surface, and the air chamber is inserted into the liquid chamber through the monohedral or polyhedral partition having a curved surface or a flat surface. At least a part thereof may be provided.

Alternatively, the relationship between the liquid chamber and the air chamber is reversed,
A form in which the air chamber is formed of a monohedron or a polyhedron including a curved surface or a plane, and the liquid chamber is at least partially disposed in the air chamber via the partition of the monohedron or the polyhedron including the curved surface or the plane. You can also.

For example, the liquid chamber is formed in a cylindrical or spherical shape, and at least one air chamber is formed in the liquid chamber concentrically with the liquid chamber through the partition formed in a cylindrical or spherical shape. May be arranged, or conversely, the air chamber is formed in a cylindrical or spherical shape, and the liquid chamber is formed through the partition formed in a cylindrical or spherical shape. At least a portion may be arranged concentrically in the air chamber.

The partition may be in the form of a flat plate or a curved plate or a combination thereof, and the liquid chamber and the air chamber may be adjacent to each other via the partition.

The "liquid chamber" can have various shapes such as a cylindrical shape, a rectangular shape, a spherical shape, or a combined shape thereof, as long as it allows the first liquid to pass therethrough.
These shapes can be expressed as a monohedron or a polyhedron including a curved surface or a plane.

The "air chamber" may have various shapes such as a cylindrical shape, a rectangular shape, a spherical shape, or a combined shape thereof as long as it can receive gas such as pressurized air. . These shapes can also be expressed as a monohedron or a polyhedron including a curved surface or a plane.

[0013] The relationship between the "liquid chamber" and the "air chamber" may be such that one is accommodated substantially entirely in the other, or only a part thereof is accommodated. May be.

"Supplying the second liquid" includes not only the case where the second liquid is liquid but also the case where the second liquid is sprayed as fine particles.

The "first liquid" is, for example, wastewater from factories, treated water or sludge from sewers, water for pools, water for fish culture, aquarium water for ornamental fish, or soft drinks or seasonings in food factories. Liquids having a high viscosity or solids may be used as long as they are fluid liquids, such as raw materials such as raw materials and materials used as raw materials in the petrochemical industry. "Second liquid" means a liquid that is mixed or reacted with a first liquid, such as water, halogen, acid,
Liquids such as alkali, phenol, creosote, dilute hydrochloric acid, dilute sulfuric acid, etc. which can be supplied from nozzles such as diluents, disinfectants, oxidizing agents, reducing agents, additives, coloring agents, bleaching agents, emulsifiers, wetting agents, dispersants, etc. It is not particularly limited.
The "first liquid" and the "second liquid" are both liquids, but of the liquids to be mixed, the larger liquid is the first liquid and the smaller liquid is the second liquid, or the liquid has a higher viscosity. It is more desirable to select the first liquid as the first liquid and the second liquid as the second liquid from an economic viewpoint such as power cost for operating the apparatus and also from the viewpoint of maintenance.

The term "gas" is used for the purpose of mixing with or reacting with the above liquid or absorbing substances in the liquid with, for example, air, oxygen, carbon dioxide, chlorine gas, nitrogen or hydrogen. It is not particularly limited as long as it is performed.

The term "concentric" does not require that the centers or center axes be completely coincident with each other, and includes a case where the positions are slightly shifted.

The term "cylindrical" does not necessarily mean a perfect cylindrical shape, but includes a cylindrical shape as a whole, even if there are some irregularities or deformations.

The term "spherical" does not necessarily mean a perfect spherical shape, but includes a shape composed of a plurality of curved surfaces having different radii of curvature.

The term "flat" does not necessarily mean a perfect flat surface, and includes a flat plate as a whole, even if there are some irregularities or deformations.

The term "mixed liquid" refers to a liquid in which a first liquid, a second liquid, and a gas are mixed. It doesn't matter if it is after or after the reaction.

The term "outlet" means an outlet from which a mixed liquid produced by the two-liquid mixing apparatus of the present invention is discharged from the apparatus. May be connected to the device or pipe.

"Liquid supply port" means a supply port provided in a part of the outer tube to which the first liquid is supplied, and its size is particularly limited as long as the first liquid can be supplied smoothly. Although not intended, the position of the liquid supply port is preferably provided on the side opposite to the outlet in consideration of the time during which the first liquid, the second liquid, and the gas are mixed. However, when it is not necessary to connect the outlet to a pipe and connect it to another device, or when such time does not need to be considered due to the properties of the first liquid and the second liquid, the supply port is located slightly closer to the outlet. It may be provided. Further, the liquid supply port may be configured to be able to continuously supply the liquid, may be configured to close the supply port after supplying the liquid, or may be configured to have an adjustment valve capable of adjusting the supply amount.

The "outer pipe" is not particularly limited in size as long as it has a mixed liquid outlet and a liquid supply port. Depending on the situation, the length and diameter may be several meters if the amount is large, and several tens of centimeters may be used for ornamental fish tank water. Further, a partition plate or a blade for preventing the first liquid from flowing backward may be provided inside the outer tube.

The “inner pipe” has a porous gas discharge port at the end of the outer pipe on the outflow side, and has a gas supply port to which gas before mixing is supplied in part. It is arranged concentrically inside the outer tube so as to form a space with the outer tube,
If the first liquid can flow into the space formed between the outer tube and the inner tube, the first liquid need not necessarily be completely concentric. “Having a porous gas outlet at the end of the outer tube on the outlet side” does not mean that the gas outlet is necessarily provided near the outlet of the outer tube. Also, this porous gas outlet is provided at the end of the outer tube on the outlet side, and the gas outlet of the inner tube is located downstream of the liquid supply port provided in the outer tube in the liquid flow direction. If so, the entire inner pipe does not necessarily need to be provided inside the outer pipe.

The "gas outlet" may be porous,
The length and diameter are preferably adjusted in consideration of the following points. In other words, in a state where the second liquid supplied from the nozzle accumulates at the tip of the inner tube, it becomes difficult to uniformly discharge the second liquid from all the pores as fine particles, so that the supplied liquid becomes porous. It is desirable to determine the flow rate of the gas and the length and diameter of the gas discharge port so that the attached second liquid can be uniformly discharged by the pressure of the gas. For example, in consideration of the gas flow rate per hour, the amount of the second liquid supplied from the nozzle, and the inner area of the porous portion, the length of the gas outlet is increased in a system in which the second liquid is frequently mixed. In a system in which the mixing of the second liquid is small or the diameter of the gas discharge port is small, it is preferable to make adjustments such as reducing the diameter of the gas discharge port.

The term "porous" refers to a substance having a large number of small pores or bubbles inside or on the inside or on the surface, which can discharge gas finely and pass through the second liquid or gas. There is no particular limitation as long as it is not damaged by the first liquid passing through.
For example, a porous plastic or a porous metal or a ceramic made of plastic such as PVA (polyvinyl alcohol), PVC (polyvinyl chloride), or polyurethane may be used in accordance with the amount of gas discharged or the amount of the second liquid. Can be used. The “gas supply port” may be configured to close the supply port after supplying the gas, or may be configured to include an adjustment valve capable of adjusting the supply amount.

The "second liquid supply pipe" has a nozzle for supplying the second liquid before mixing near the gas discharge port inside the inner pipe, and the second liquid before mixing is supplied at one end. It has a liquid supply port at the other end, and can have an appropriate length and diameter according to the properties and purpose of the second liquid, like the first liquid or gas. The second liquid supply pipe is preferably arranged concentrically with the inner pipe so that the second liquid can be evenly supplied from the nozzle to the inside of the inner pipe. The shape of the “nozzle” is not particularly limited as long as it can supply the second liquid at a high speed, but the second liquid is uniformly and efficiently supplied to the entire vicinity of the gas outlet inside the inner tube. It is desirable that it can be supplied. As long as the nozzle can supply the second liquid uniformly and efficiently, the nozzle may be supplied from the entire surface of the nozzle or may be supplied only from the side surface.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a two-liquid mixing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a schematic configuration of a two-liquid mixing apparatus according to one embodiment of the present invention.

The two-liquid mixing apparatus 1 according to one embodiment of the present invention comprises an outer tube or liquid chamber 2 having a liquid supply port 7 for supplying sludge 11 as a first liquid on the side, An inner tube or air chamber 3 concentrically arranged in the outer tube 2 so as to form a space therebetween, and a second liquid supply tube 4 concentrically arranged in the inner tube 3. Is provided.

The outer pipe 2 is connected to an outlet 10 for flowing out a mixed liquid 14 in which sludge 11, 35% hydrogen peroxide 12 as a second liquid, and air 13 as a gas are mixed. Downstream. The inner pipe 3 has a porous gas discharge port 6 or a porous partition wall 6 at the end of the outer pipe 2 on the outlet 10 side, and has a gas supply port 8 to which air 13 is supplied on a side. I have. A means for supplying the pressurized air 13 to the inner pipe 3, for example, a pump, a compressor and related piping (not shown) is connected to the gas supply port 8. Gas outlet 6
Is located downstream of the liquid supply port 7 of the outer tube 2 in the liquid flow direction and is located substantially at the center of the outer tube 2, and only the side surfaces are made of porous PVC. Second liquid supply pipe 4
Is located near the gas outlet 6 inside the inner pipe 3.
Has a nozzle (supply means) 5 at one end and a liquid supply port 9 for supplying hydrogen peroxide 12 at the other end.

Next, the treatment of sludge 11 using the two-liquid mixing apparatus according to one embodiment of the present invention will be described as an example. Although the sludge 11 is not a perfect liquid, it can be easily mixed even with such a highly viscous substance.

First, sludge (first liquid) 11 is supplied into the outer pipe 2 from the first liquid supply port 7. Air (gas) 1
3 is supplied from the gas supply port 8 into the inner pipe 3, and hydrogen peroxide (second liquid) 12 is supplied from the second liquid supply port 9 into the second liquid supply pipe 4. Hydrogen peroxide 12 is sprayed from the nozzle 5 provided at the tip of the second liquid supply pipe 4 into the inside of the porous gas discharge port 6 of the inner pipe 3. On the other hand, the sludge 11 gradually moves downstream with respect to the liquid flow direction of the outer pipe 2, and the hydrogen peroxide 12 adhering to the inside of the porous gas discharge port 6 becomes The gas is discharged from the gas discharge port 6 into the outer tube 2.
The discharged hydrogen peroxide 12 and air 13 are mixed into sludge 11 as fine particles. The mixed sludge 11, hydrogen peroxide 12, and air 13 are mixed and discharged from the outlet 10 of the outer pipe 2 by the sludge 11 supplied subsequently and the like. The MLSS (solids in the aeration tank) of the sludge 11 before mixing supplied from the first liquid supply port 7 is 50
100 to 8000 ppm, but 100
It is 0 to 2000 ppm, and it can be confirmed that the decomposition reaction was effectively performed by the hydrogen peroxide mixed as fine particles.

FIG. 2 is a sectional view showing a schematic configuration of a two-liquid mixing apparatus according to another embodiment of the present invention.

The structure of the two-liquid mixing device 1a shown in FIG. 2 is as follows. A liquid chamber 2a through which the first liquid 11 passes, and an air chamber 3a adjacent to the liquid chamber 2a via a porous partition wall 6a.
A means such as a compressor for supplying the pressurized gas 13 to the gas chamber 3a, and one or more (two in FIG. 2) means 5 for spraying the second liquid 12 into the gas chamber 3a, for example. A spray nozzle 5 and the like are provided. The liquid chamber 2a contains the first liquid 11
And an outlet 10a for flowing out a mixed liquid 14 in which a second liquid 12 and air 13 as a gas are mixed, is provided downstream in the liquid flowing direction. The air chamber 3a communicates with the liquid chamber 2a by a porous flat partition wall 6a. The gas chamber 3a has a gas supply port 8a to which the gas 13 is supplied on a side portion. A second liquid supply pipe 4a is provided on the side of the air chamber 3a, and a means 5 for spraying the second liquid 12 is attached to a tip of the second liquid supply pipe 4a.

The mixed liquid 14 is manufactured by the two-liquid mixing apparatus 1a as follows. First, the first liquid 11 is supplied to the liquid chamber 2.
a from the first liquid supply port 7a. Gas 13
Is supplied from the gas supply port 8a into the air chamber 3a. The second liquid 12 is supplied into the second liquid supply pipe 4a, and is subsequently sprayed from the nozzle 5 into the air chamber 3a. On the other hand, the first liquid 11 gradually moves in the liquid flowing direction of the liquid chamber 2a,
At the same time, the second liquid 12 adhered to the partition 6a
Is discharged from the porous partition wall 6a together with the gas 13 into the liquid chamber 2a. The discharged liquid 12 and gas 13 become fine particles and are mixed into the first liquid 11 to form a foam (shown as many small particles in the figure). The mixed first liquid 11, second liquid 12, and gas 13 are discharged as a mixed liquid 14 from the outlet 10a of the liquid chamber 2a by the first liquid 11 and the like that are subsequently supplied.

Although the liquid chamber 2a is overlaid on the gas chamber 3a in FIG. 2, the gas chamber 3a may be overlaid on the liquid chamber 2a. Further, the cross sections of the liquid chamber 2a and the air chamber 3a may be rectangular or semicircular like a match box.

FIG. 3 is a sectional view showing a schematic configuration of a two-liquid mixing apparatus according to another embodiment of the present invention.

The structure of the two-liquid mixing device 1b shown in FIG. 3 is as follows. A substantially cylindrical liquid chamber 2b whose center is swollen and through which the first liquid 11 passes is vertically arranged, and a cylindrical air chamber 3b is horizontally arranged inside the liquid chamber 2b. Liquid chamber 2b
Is provided with a first liquid supply port 7b at one end. The air chamber 3b is surrounded by a porous cylindrical partition 6b, and the liquid chamber 2b and the air chamber 3b are adjacent to each other via the porous cylindrical partition 6b. That is, the air chamber 3 b is formed of the porous partition wall 6.
b communicates with the liquid chamber 2b. The gas chamber 3b has a gas supply port 8b for supplying the pressurized gas 13 to the gas chamber 3b. A means 5 for spraying the second liquid 12 into the air chamber 3b, for example, a spray nozzle is provided. The liquid chamber 2b is
An outlet 10b for flowing out a mixed liquid 14 in which the first liquid 11, the second liquid 12, and the gas 13 are mixed is provided at a downstream end in the liquid flowing direction. The air chamber 3b is a gas 13
Is provided on the side of the gas chamber 3b, and a means 5 for spraying the second liquid 12 at the tip of the pipe 4b for supplying the second liquid 12 is provided. Installed. The method for producing the mixed liquid 14 by the two-liquid mixing device 1b is similar to the description in the above-described embodiment, and therefore is replaced with this and the detailed description is omitted. In the embodiment of FIG. 3, the liquid chamber 2b is arranged in the vertical direction, and the gas chamber 3b is arranged in the horizontal direction. However, these may be arranged reversely or at an angle of 90 degrees. it can.

FIG. 4 is a sectional view showing a schematic configuration of a two-liquid mixing apparatus according to still another embodiment of the present invention.

The structure of the two-liquid mixing device 1c shown in FIG. 4 is as follows. Cylindrical liquid chamber 2c through which first liquid 11 passes
Are arranged in the lateral direction, and a cylindrical air chamber 3c surrounds the liquid chamber 2c. The first liquid supply port 7 is provided in the liquid chamber 2c.
c is provided. The air chamber 3 c has a porous cylindrical partition wall 6.
c, and the liquid chamber 2c and the air chamber 3c are adjacent to each other via a porous cylindrical partition wall 6c. That is, the air chamber 3
c communicates with the liquid chamber 2c through the porous partition 6c. The gas chamber 3c is provided with a gas supply port 8c for supplying a pressurized gas 13, and means 5 for spraying the second liquid supply pipe 4c and the second liquid 12 fixed at the tip thereof into the gas chamber 3c. For example, a spray nozzle is provided. The liquid chamber 2c has an outlet 10c for flowing out a mixed liquid 14 in which the first liquid 11, the second liquid 12, and the gas 13 are mixed, in the downstream of the liquid flow direction. Mixed liquid 1 by two-liquid mixing device 1c
Since the method of manufacturing 4 is similar to the above-described embodiment, it is substituted for this and the detailed description thereof will be omitted. In the embodiment of FIG. 4, the liquid chamber 2c and the gas chamber 3c are arranged concentrically in the horizontal direction, but may be arranged in the vertical direction. Further, the arrangement of the liquid chamber 2c and the air chamber 3c may be reversed. That is, the air chamber 3c may be arranged inside the liquid chamber 2c.

FIG. 5 is a sectional view showing a schematic configuration of a two-liquid mixing apparatus 1d according to still another embodiment of the present invention.

As shown in FIG. 5, a spherical liquid chamber 2d through which the first liquid 11 passes is disposed, and a spherical gas chamber 3d is disposed at the center of the liquid chamber 2d. A first liquid supply port 7d is provided in the liquid chamber 2d. The air chamber 3d is surrounded by a porous spherical partition 6d, and the liquid chamber 2d and the air chamber 3d are adjacent to each other via the porous spherical partition 6d. That is, the gas chamber 3d is connected to the liquid chamber 2d through the porous spherical partition wall 6d.
Is in communication with The gas chamber 3d is provided with a gas supply port 8d for supplying a pressurized gas 13, and means 5 for spraying the second liquid supply pipe 4d and the second liquid 12 fixed at the tip thereof into the gas chamber 3d. For example, a spray nozzle is provided. Liquid chamber 2
d is a first liquid 11, a second liquid 12, and a gas 13
Has an outlet 10d at the downstream side in the liquid flowing direction for flowing out the mixed liquid 14 in which the liquid is mixed. The method for producing the mixed liquid 14 by the two-liquid mixing apparatus 1d is similar to the description in the above-described embodiment, and will be substituted therefor. The liquid chamber 2d
And the arrangement of the air chamber 3d may be reversed. That is, the air chamber 3d
May be arranged outside the liquid chamber 2d.

[0045]

According to the present invention, there is provided a two-liquid mixing apparatus, comprising: a liquid chamber through which the first liquid passes; an air chamber adjacent to the liquid chamber via a porous partition; Since the apparatus includes the means for supplying the gas to the gas chamber and the means for supplying the second liquid to the gas chamber, the gas can be mixed with the first liquid in an ultrafine manner.

Further, since the two-liquid mixing apparatus of the present invention has means for supplying the second liquid before mixing into the gas chamber, the second liquid is pushed out of the porous partition wall together with the gas by the gas. Therefore, the second liquid can be mixed with the first liquid in the form of fine particles in the same manner as the gas, and the two liquids can be continuously mixed at a high speed.

Further, the two-liquid mixing device of the present invention supplies the first liquid to the liquid chamber, the gas to the gas chamber, and the second liquid to the gas chamber, that is, supplies the second liquid. Since the means and the first liquid are not in direct contact with each other and a gas is interposed between the first liquid and the second liquid, when the apparatus is stopped, the nozzle is in the first position. Without causing clogging by sucking the liquid,
Blockage of the pores of the gas discharge port that is in direct contact with the first liquid can be reduced.

Even if the first liquid contains a certain amount of solid, the two liquids can be mixed without closing the apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a two-liquid mixing device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a two-liquid mixing device according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a two-liquid mixing device according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a two-liquid mixing device according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a two-liquid mixing device according to an embodiment of the present invention.

[Description of Signs] 1, 1a, 1b, 1c, 1d Two-liquid mixing device 2 Outer tube 2a, 2b, 2c, 2d Liquid chamber 3 Inner tube 3a, 3b, 3c, 3d Air chamber 4, 4a, 4b, 4c, 4d second liquid supply pipe 5 supply means (spray means) 6, 6a, 6b, 6c, 6d porous partition or gas outlet 7, 7a, 7b, 7c, 7d first liquid supply 8, 8a, 8b, 8c, 8d Gas supply port 9 Second liquid supply port 10, 10a, 10b, 10c, 10d Outflow port 11 Sludge (first liquid) 12 Hydrogen peroxide (second liquid) 13 Gas 14 Mixture

Claims (3)

[Claims] 1. A two-liquid mixing apparatus for mixing a first liquid and a second liquid, wherein a liquid chamber through which the first liquid passes, and a gas chamber adjacent to the liquid chamber via a porous partition. And a means for supplying a pressurized gas to the gas chamber, and means for supplying the second liquid into the gas chamber. 2. The liquid chamber is formed of a monohedron or a polyhedron including a curved surface or a flat surface, and the air chamber is at least partially disposed in the liquid chamber through the monohedral or polyhedral partition including a curved surface or a flat surface. The two-liquid mixing device according to claim 1, wherein the mixing is performed. 3. The air chamber is formed of a monohedron or a polyhedron having a curved surface or a flat surface, and the liquid chamber is at least partially disposed in the air chamber through the monohedral or polyhedral partition having a curved surface or a flat surface. The two-liquid mixing device according to claim 1, wherein the mixing is performed.