JP2001187326A - Device for mixing gas and water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a gas-water mixing device having a simple structure, which is capable of forming a gas-water mixed liquid such as ozone water as a mixed liquid containing ultrafine particulate bubbles without causing separation of a gas present in a desired ratio from water. SOLUTION: The gas-water mixing device A has an introducing part for introducing pressure water and gas into a hollow easing 10, a first rotary cylinder 14 provided at the inside, which is a hollow cylindrical form and a second rotary cylinder 18 which supports the first rotary cylinder 14. The gas-water mixed liquid is produced by allowing the pressure water to flow in the tangential direction through an introducing hole 16 from a pressure chamber K provided at the outer peripheral part of the first rotary cylinder 14, and then introducing the gas through an introducing hole 15 provided at the end wall of the rotary cylinder 14 by the first rotary flow to mix ultrafine particulate bubbles into the rotary flow, passing the mixture through a suction resistance plate 19 as mixed liquid in the bubble containing liquid state free from separation of gas and discharging the mixed liquid from a discharging port 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam-water mixer for efficiently dissolving and mixing a gas such as ozone in water using water pressure.

[0002]

2. Description of the Related Art Ozone water is used in food factories, agricultural and fishery processing plants,
Widely used in facilities that require clean water, such as medical facilities, restaurant kitchens, baths, and swimming pools.Use ozone sterilizing power to clean target products, or sterilize harmful bacteria in water to produce clean water. It is used for various purposes such as hygiene management. As a device for generating such ozone water, tap water is sent to a gas-liquid separation tank, and ozone is mixed and returned to the tank while the stored water is circulated by a gas-liquid mixing pump. A type in which water is discharged from a faucet outlet attached to a tank is known, but this is generally a large facility.

As an apparatus for easily generating ozone water, as shown in FIG. 5, a pressure reducing valve 4v and an ejector X are provided in the middle of a water supply pipe 1 route to an outlet of a faucet 2, and an ozonizer (ozone generation) is provided to the ejector X. A high pressure ozone gas is sent from the vessel 5 and mixed under pressure or mixed and dissolved in a faucet (not shown). 4 is a check valve, 6 is a compression pump, 8 is a dehumidifier using silica gel or the like, 9 is an air separator, 9a is an exhaust valve (containing activated carbon).
It is. The dissolution efficiency of a gas in a liquid is greater as the difference in pressure is greater.Therefore, the former method using the pressure difference is more efficient, and the latter method releases both the gas and liquid to atmospheric pressure, so the dissolution efficiency is higher. I don't go up.

[0004]

However, in a system in which an ozone-containing gas is dissolved and mixed in pressurized water by an ejector, even if the ozone-containing gas is sent at a pressure higher than the pressure water, the basic function of the ejector is simply gas Only has a function of atomizing the gas and mixing it with the pressure water, and has only a small amount that can be dissolved in the pressure water due to the pressure difference, for example, only a few percent of the water is dissolved. Alternatively, the injected gas flows downstream with large bubbles without being mixed with the pressurized water in a separated state, and is discharged from the water tap.

For this reason, when the gas is an ozone-containing gas, the gas which is not dissolved and mixed in the pressurized water is separated via a gas-water separator (air separator) on the way to the faucet in order to prevent the gas which is not mixed and discharged from the faucet. In addition, the activated carbon of the exhaust valve is separated by adsorption treatment. Nevertheless, large bubbles of the ozone-containing gas, which are not yet separated, are released into the atmosphere from the faucet together with the pressure water, so that waste ozone released into the atmosphere when performing cleaning work using ozone water, etc. Measures are also needed.

The present invention takes into account the various problems associated with the conventional ozone water generation as described above, and efficiently mixes a gas into a desired ratio to produce a gas containing a highly concentrated ultrafine gas. It is an object of the present invention to provide a steam-water mixer capable of producing contained water.

[0007]

According to the present invention, as one of means for solving the above-mentioned problems, one end is closed and the other end is open in a hollow casing provided with a pressure water and a gas inlet at one end or near one end. A hollow cylinder is supported and provided, and a water introduction hole is provided at a predetermined position of the hollow cylinder tangentially to the inner periphery thereof, and a gas introduction hole is provided on a closed end wall, and pressure water is sent from the introduction portion. A swirl flow is generated in the cylinder by the flow flowing from the water guide hole of the hollow cylinder, gas is introduced from the introduction hole of the hollow cylinder by the suction force and mixed with the swirl flow, and the swirl flow is adjacent to the open end of the hollow cylinder. Thus, the steam-water mixer is configured to pass through the suction resistance plate provided in the above-mentioned manner and to discharge the gas from the discharge port at the other end of the casing.

[0008] In the steam-water mixer having the above-described structure, a large amount of gas is mixed as fine bubbles into the water stream to generate water containing a high proportion of gas. If the gas is ozone air, ozone water equivalent to high-concentration ozone water can be obtained. The water that has flowed into the hollow cylinder swirls in the swirl chamber and is mixed while the gas introduced from the gas introduction hole in the end wall of the hollow cylinder violently collides with the swirl flow, forming ultrafine bubbles in the swirl flow. And flows downward. In the case of a small pressure, the gas to be introduced is sucked by the suction force of the swirling flow and mixed with the swirling flow, but the gas may be pressure-fed at a certain pressure and introduced through the introduction hole.

The flow coming out of the hollow cylinder is removed by the rotation as a swirling flow passing through the suction resistance plate and is discharged from the discharge port. However, the suction resistance plate is not provided, and the swirl flow is strong. It is provided to prevent the outside air from flowing back from the discharge port side toward the center of the swirling flow, and large bubbles are discharged by making the hole diameter of the resistance plate very small. It is provided to prevent that.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a steam-water mixer A of the embodiment.
1 shows an overall schematic system diagram in the case of using as an ozone water generator. In the steam-water mixer A, tap water is supplied from the tap pipe 1 as pressurized water (generally, a pressure of 1.2 to 1.5 kgf / c).
m ² g) The ozone-containing air which is fed and mixed with the air sent from the ozone generator 5 and the air sent from the compression pump 6 is sent from the air supply pipe 3 through the check valve 4 through the check valve 4. It is configured to be mixed and discharged. In the illustrated example, the ozone-containing air is mixed with the pressurized water to generate the ozone water. However, only the air may be mixed instead of the ozone-containing air. Hereinafter, description will be made assuming that the ozone water generator is used.

FIG. 2 shows a main longitudinal sectional view of the steam-water mixer A.
The mixer A is provided with a water supply pipe 1 and an introduction part of an air supply pipe 3 at an upper end which is one end of the hollow casing 10 and a position near the upper end. The introduction part of the water supply pipe 1 includes a holding ring 11a and a tightening ring 11b which are screwed into the screw part 10A at the upper end.
Is engaged with the tip of the water supply pipe 1, the packing 11 c is pressed against the mounting ring 11 d, and the water supply pipe 1 is connected so that its center line coincides with the center line of the casing 10. The mounting ring 11d is supported on a seat 12 provided at a position near the upper end in the casing. The pressurized water from the water supply pipe 1 flows into the upper chamber J from the through hole at the center of the packing 11c and the mounting ring 11d.

In the illustrated example, the seat 12 is shown in FIG.
As shown in FIG. 3, the casing 10 is provided so as to close the casing at a position close to the upper end of the casing 10, and the communication hole 12 a is provided at an appropriate position.
Are provided at a plurality of locations (four locations in the illustrated example). The seat 12 is provided on the casing 10 as shown in the illustrated example.
The inner peripheral surface may not be closed, but may be provided in a band shape as shown by a dashed line in FIG. 3B.
In that case, the circulation hole 12a may not be provided. In the space below the seat 12, a hollow cylindrical primary swivel cylinder 14 having one end closed and the other end open is supported between the secondary swivel cylinder 18 and the seat 12.

The primary swivel cylinder 14 is provided with a gas introduction hole 15 in a closed end wall at the upper end, and is supplied with a small pressure from the air supply pipe 3 to an air chamber 13 provided in the center of the seat 12 through a conduction hole. The ozone-containing air sent at a certain pressure is introduced into the introduction hole 15.
It is formed so as to be sucked or introduced from the inside. As shown in FIG. 3A, a plurality of water guide holes 16 are provided at appropriate positions in the tangential direction with respect to the inner circumference of the cylindrical wall of the primary swivel cylinder 14. The pressure water flowing into the pressure chamber K between the primary swivel cylinder 14 and the inner periphery 17 of the casing 10 is
6 flows into the inside of the primary swirl cylinder 14 in the tangential direction inside the primary swirl cylinder 14 and moves downward as a primary swirl flow.

When the primary swirling flow flows downward, the ozone-containing gas is sucked or introduced from the inlet hole 15 at the upper end by the suction pressure or introduction, and is mixed with the swirling flow. As shown in the figure, the secondary swivel cylinder 18 has a substantially conical cross section (a shape obtained by cutting off the upper part of the cone) and has a horizontal horizontal support seat in the middle. Smaller diameter flow hole 18
a is provided. This flow hole 18a is for reducing the pressure by consuming the pressure remaining in the primary swirling flow. The lower end of the primary swivel cylinder 14 is fitted and supported on the upper part of the secondary swivel cylinder 18 above the support seat.
The swirling flow passing through 8a is swirled secondarily.

A suction resistance plate 19 is provided below and adjacent to the secondary swivel cylinder 18. The suction resistance plate 19 is a mesh plate in which countless small holes are formed in a stainless steel plate, and a large number of small holes are provided in such a manner that the total area of the small holes is about 1/2 with respect to the entire area. The stainless steel plate is 0.2 in the illustrated example.
mm, and the diameter of one small hole is 0.1 mm or less. The suction resistance plate 19 is for preventing the air from flowing backward from the discharge side and growing. By providing the suction resistance plate 19, the suction or introduction of the ozone-containing air from the air chamber 13 by the spiral flow is ensured. it can.

The flow passing through the suction resistance plate 19 is collected in the downstream chamber N in the cup-shaped lower casing 10 ′ connected to the lower portion of the casing 10 by the screw portion 10 b, and is provided with a discharge port provided with the rectifying member 20. It is configured to be discharged from the outside to the outside.

The steam-water mixer A according to the embodiment having the above-described structure.
Then, ozone water is generated. The pressurized water from the water supply pipe 1 flows into the pressure chamber K through the flow path of the introduction part, and
The pressure water flowing tangentially into the inner primary swirl chamber L from the water guide hole 16 flows toward the open end of the lower part of the cylinder while vigorously swirling, forming a primary swirl flow. And a small pressure or a certain pressure of ozone-containing air (not so much as to exceed the suction force) is sucked or introduced from the introduction hole 15 and mixed as fine bubbles while violently colliding with the primary swirling flow ( It flows downward as a stream that is contained without being separated from water).

The pressure of the primary swirling flow is reduced by the flow hole 18a of the secondary swirling tube 18, and the secondary swirling flow passes through the suction resistance plate 19 while rotating again in the secondary swirling chamber M having a large diameter. It is collected in the chamber N and discharged from the discharge port 21.
Due to the action of the primary swirling flow and the secondary swirling flow, the flow dissolved and mixed as fine bubbles by swirling and pressure is discharged as ozone water containing extremely fine ozone-containing bubbles.

The secondary swirling flow is required to reduce the degree of the swirling flow by making the swirling flow larger in diameter than the primary swirling flow so that the swirling flow can pass through the suction resistance plate 19 without difficulty. The opposing phenomena of preventing outside air that may flow backward from the discharge port 21 by the use of 19 are reconciled by generating a secondary swirling flow.

FIG. 4 is a main longitudinal sectional view of a steam-water mixer A 'according to a second embodiment. In this embodiment, the relationship between the partial configurations of the water and gas introduction sections is opposite to that of the first embodiment. As shown, the water supply pipe 1 is a hollow casing 10.
Is connected to the side near one end by a connection member of the introduction portion 11 ′. The air supply pipe 3 for the ozone-containing air is introduced into the introduction section 13 '.
Is connected to one end of the hollow casing 10 on the center line thereof. It is not provided in the upper chamber J or the seat 12, and the introduction part 11 'is directly connected to the pressure chamber K.

The lower casing 10 'is connected to the lower part of the hollow casing 10 via a threaded portion 10b in the same manner, but the secondary revolving cylinder 18 is not provided, and the lower casing 10' The primary turning cylinder 14 is supported by the provided support seat 18 '. The lower end of the primary swivel cylinder 14 has an open end via a support seat 18 'having an opening of the same diameter, and is connected to the secondary swivel chamber M inside the lower casing 10'. A suction resistance plate 19 is provided below the secondary swirling chamber M, and is formed so as to be connected to the outlet 21 via the downstream chamber N.

The main operation of the steam-water mixing device A 'of the second embodiment is basically the same as that of the first embodiment. The pressure water that has flowed into the pressure application K flows into the primary swirl chamber L from the water introduction hole 16, sucks ozone-containing gas from the introduction hole 15 by the flow of the primary swirl flow, and dissolves fine air bubbles into the flow. The mixed gas flows downward, flows through the suction resistance plate 19 as a flow expanded in the secondary swirl chamber M, and is discharged from the discharge port 21.

[0023]

As described above in detail, the steam-water mixer according to the present invention allows the pressurized water to flow into the hollow cylinder in the casing and causes the swirling flow to flow downward, thereby introducing the inlet hole in the end wall of the hollow cylinder. The gas is introduced into the swirl flow and mixed with the swirl flow, and a suction resistance plate provided below and adjacent to the hollow cylinder prevents external air flowing backward from the discharge port side and discharges the flow to the discharge port. Gas can be mixed into the water stream at a high mixing ratio in ultra-fine form, and the gas-mixed water stream is discharged as mixed water without gas separation.For example, ozone-containing air is mixed as gas. This has a remarkable effect that ozone water having a strong sterilizing action can be generated by a mixer having a simple structure.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram of a steam-water mixing system.

FIG. 2 is a main longitudinal sectional view of the steam-water mixer of the first embodiment.

FIG. 3 is a cross-sectional view as viewed from arrows IIIa to IIIa and IIIb to IIIb in FIG. 2;

FIG. 4 is a main longitudinal sectional view of a steam-water mixer of a second embodiment.

FIG. 5 is an overall schematic diagram of a conventional air-water mixing system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water supply pipe 3 Air supply pipe 10 Hollow casing 12 Seat 14 Primary swivel cylinder 15 Inlet hole 16 Water guide hole 18 Secondary swivel cylinder 19 Suction resistance plate 21 Discharge port

Claims (2)

[Claims] 1. A hollow casing having one end closed and the other end open is provided in a hollow casing provided with a pressure water and gas introduction part at one end or near one end, and a hollow cylinder is provided at a predetermined position of the hollow cylinder. A water introduction hole is provided tangentially to the inner circumference, and a gas introduction hole is provided in the closed end wall, pressure water is sent from the introduction portion, and a swirling flow flows into the cylinder by a flow flowing from the water introduction hole of the hollow cylinder. The gas is introduced from the introduction hole of the hollow cylinder by the suction force or by the introduction thereof and mixed with the swirling flow, passed through a suction resistance plate provided adjacent to the open end of the hollow cylinder, and the other end of the casing is formed. A steam-water mixer that is designed to be discharged from the discharge port of the water. 2. The hollow cylinder is formed of a primary swivel cylinder and a secondary swivel cylinder supporting the swivel cylinder, and the inner diameter of the secondary swivel cylinder is made larger than the open end diameter of the primary swivel cylinder to generate a swirl flow. The steam mixer according to claim 1, wherein a gas is mixed by generating a primary swirling flow and a secondary swirling flow.