JP2024014395A - Gas dissolution device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas dissolution device which efficiently increases a gas dissolution amount in a liquid even with small output of a pump.

SOLUTION: A gas dissolution device 1 has a treatment space 4 composed of a cylindrical body 2 and a plate body 3 for closing both openings of the cylindrical body 2, an inflow port 5 which is provided in the cylindrical body 2 and flows gas-liquid mixed fluid where gas and liquid are mixed into the treatment space 4, and a discharge port 6 for discharging the gas-liquid mixed fluid provided in the cylindrical body 2 from the treatment space 4. A part of the gas-liquid mixed fluid spirally swirls from an outflow port 5 to the discharge port 6 in the treatment space 4. Shear parts 31-1 to 31-4 for imparting shear force to the spirally swirling gas-liquid mixed fluid are provided in the treatment space 4.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a gas dissolving device that efficiently melts gas in a liquid, and in particular, a gas dissolving device that can efficiently increase the amount of gas dissolved in the liquid and slow down the decrease in the amount of gas dissolved in the liquid over time. Regarding the melting device.

BACKGROUND ART Conventionally, liquids with an increased amount of dissolved gas have been used in, for example, the food field, agricultural field, environmental field, etc., and the fields of their use tend to expand. Regarding liquids with an increased amount of gas dissolved therein, devices are known that generate fine bubbles such as microbubbles and nanobubbles to increase the amount of gas dissolved in the liquid. There is a gas dissolving device described in JP-A-2013-081880 as a device that generates such fine bubbles such as microbubbles and nanobubbles and dissolves the bubbles (expectedly) in a liquid.

In the gas dissolving device, the gas dissolving device 1 includes a processing space consisting of a cylinder and a plate that respectively closes both openings of the cylinder, and a gas-liquid mixed fluid provided in the cylinder and containing a mixture of gas and liquid. has an inlet that flows into the processing space, and an outlet that is provided in the cylinder and discharges the gas-liquid mixed fluid from the processing space, and a part of the gas-liquid mixed fluid flows from the outlet to the outlet in the processing space. It spirals all the way to the top.

JP2013-081880A

By the way, there is a demand for further increasing the amount of gas dissolved in the liquid of the conventional gas dissolving device described above.

In view of the above, an object of the present invention is to provide a gas dissolving device that can more efficiently increase the amount of gas dissolved in a liquid even if the pump output is small.

In order to solve the above problems, the gas dissolving device of the present invention includes a processing space consisting of a cylinder and a plate that respectively closes both openings of the cylinder, and a processing space provided in the cylinder, in which gas and liquid are mixed. A gas dissolving device having an inlet through which the gas-liquid mixed fluid flows into the processing space, and an outlet provided in the cylindrical body to discharge the gas-liquid mixed fluid from the processing space. A part of the mixed fluid spirally swirls in the processing space from the outlet to the discharge port, and a shearing section that applies a shearing force to the spirally swirling gas-liquid mixed fluid is arranged so that the shearing section applies a shearing force to the spirally swirling gas-liquid mixed fluid. located within the space.

Preferably, the gas dissolving device includes a processing space including a cylinder and a plate that respectively closes both openings of the cylinder, and a liquid inlet provided in the cylinder and through which liquid flows into the processing space. , a gas inlet provided in the cylindrical body or the plate body, through which gas flows into the processing space, and an outlet provided in the cylindrical body, through which the liquid and the gas are discharged from the processing space. In the dissolving device, a portion of the fluid consisting of the liquid and the gas spirals within the processing space from the liquid outlet to the discharge port.

According to the gas dissolving device of the present invention, a part of the gas-liquid mixed fluid spirally turns in the processing space from the outlet to the discharge port, so that centrifugal force due to the spiral turns is applied to the gas-liquid mixed fluid. In addition, the gas-liquid mixed fluid is pressurized. In a pressurized gas-liquid mixed fluid, gas can be efficiently dissolved in liquid.
In addition, in the process of the gas-liquid mixed fluid flowing from the inlet to the outlet while spiraling, it is sheared by the shearing part, and the gas can be dissolved into the liquid more efficiently.

Further, since a part of the gas-liquid mixed fluid spirals within the processing space from the outlet to the discharge port, the gas-liquid mixed fluid passes through the processing space smoothly. Gas can be efficiently dissolved in liquid even if the pressure applied to the gas-liquid mixed fluid is low, and a pump with low output can be used.

Preferably, a part of the gas-liquid mixed fluid has a helical swirl in a laminar flow.

A device for generating microbubbles and nanobubbles needs to swirl a gas-liquid mixed fluid at high speed. However, the gas dissolving device according to claim 2 operates in the same manner as the gas dissolving device according to claim 1, and furthermore, a part of the gas-liquid mixed fluid has a laminar spiral flow, and microbubbles, nanobubbles, etc. This is not a device that actively generates bubbles, but rather a device that suppresses the generation of bubbles such as microbubbles and nanobubbles. Therefore, compared to devices that generate microbubbles and nanobubbles, the present invention can increase the amount of dissolved gas in the liquid even if the swirling speed of the gas-liquid mixed fluid is low. As a result, it is possible to reduce the output of the pump for flowing the gas-liquid mixed fluid into the processing space, thereby achieving energy savings.

Preferably, a plurality of the shearing sections are provided at different positions in the processing space in both a gravitational direction of the processing space and a first horizontal direction perpendicular to the gravitational direction.

Preferably, the plurality of shearing portions are provided at further different positions in both the gravity direction and a second direction perpendicular to both the first horizontal direction.

Preferably, the plurality of shearing parts are linear members.

Preferably, the plurality of shearing parts are tapered members that taper toward the center of the processing space.

Preferably, the shearing section is located within the processing space between the liquid inlet, the gas inlet, and the outlet.

Preferably, the helical swirl of a portion of the gas-liquid mixed fluid is a laminar flow.

Further, since the pressure in the cavity is approximately atmospheric pressure, the pressure of the discharged water discharged from the discharge port can be prevented from rapidly decreasing and generating bubbles in the liquid.

According to the present invention, it is possible to provide a gas dissolving device that efficiently increases the amount of gas dissolved in a liquid even if the pump output is small.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the structure of the front side of the gas dissolution apparatus of 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the structure of the side surface side of the gas dissolution apparatus of 1st Embodiment of this invention. FIG. 3 is a diagram for explaining the front configuration of a shearing section provided in the processing space of the gas dissolving device according to the first embodiment of the present invention. FIG. 4 is a diagram for explaining a configuration in a side direction of a shearing section provided in the processing space shown in FIG. 3; FIG. 7 is a diagram for explaining the front configuration of a shearing section provided in a processing space of a gas dissolving device according to a second embodiment of the present invention. FIG. 6 is a diagram for explaining the configuration of a shearing section provided in the processing space shown in FIG. 5 in a side direction.

Hereinafter, one embodiment of the present invention will be described based on the drawings.
<First embodiment>
The dashed-dotted line arrows in FIGS. 1 and 2 indicate an example of the flow of the gas-liquid mixed fluid.
As shown in FIGS. 1 and 2, the gas dissolving device 1 of this embodiment includes a processing space 4 consisting of a cylinder 2 and a plate 3 that closes both openings of the cylinder 2, and a processing space 4 provided in the cylinder 2. It has an inlet 5 through which a gas-liquid mixed fluid containing gas and liquid flows into the processing space 4, and an outlet 6 provided in the cylindrical body 2 to discharge the gas-liquid mixed fluid from the processing space.

The cylindrical body 2 has a circular cross section. The plate 3 is also a circular plate having a sufficient size to close both openings of the cylinder 2.

As shown in the side view of FIG. 1, the inlet 5 and the outlet 6 are provided at positions shifted in the axial direction of the cylinder 2. The gas-liquid mixed fluid that has flowed into the processing space from the inlet 5 heads toward the outlet 6 while swirling along the cylinder 2 . Therefore, as shown by the dashed-dotted line arrow in FIG. 1, a part of the gas-liquid mixed fluid spirals within the processing space 4 from the outlet 5 to the outlet 6.

FIG. 3 is a diagram for explaining the front configuration of the shearing section 31 provided in the processing space 4 of the gas dissolving apparatus 1 according to the first embodiment of the present invention. FIG. 4 is a diagram for explaining the configuration of the shearing section 31 provided in the processing space 4 shown in FIG. 3 in the side direction.

As shown in FIG. 3, four shearing portions 31-1 to 31-4 are provided in the processing space 4, extending in the direction of gravity (vertical direction in FIG. 3) when viewed from the front.
The shearing parts 31-1 to 31-4 are linear members.
As shown in FIG. 3, the shearing portions 31-1 to 31-4 are provided at different positions and at equal intervals in a first horizontal direction (left-right direction in FIG. 3) perpendicular to the direction of gravity.

As shown in FIG. 4, the four shearing parts 31-1 to 31-4 are arranged in a second horizontal direction perpendicular to the gravity direction and the first horizontal direction (left and right in FIG. direction).

The shearing parts 31-1 to 31-4 are provided between the outlet 5 and the outlet 6 in the processing space 4. In this way, by providing the shearing parts 31-1 to 31-4 between the inlet 5 and the outlet 6, the gas-liquid mixed fluid is efficiently sheared by the shearing parts 31-1 to 31-4. The amount of gas dissolved in the liquid can be increased more efficiently.

According to the gas dissolving device 1, the centrifugal force due to the spiral rotation is applied to the gas-liquid mixed fluid to pressurize the gas-liquid mixed fluid, so that the pressurized gas-liquid mixed fluid efficiently dissolves gas in the liquid. be able to.

Further, according to the gas dissolving device 1, in the process in which the gas-liquid mixed fluid flows from the inlet 5 to the outlet 6 while spirally turning, it is sheared by the shearing parts 31-1 to 31-4, and converts gas into liquid more efficiently. Can be dissolved well.

A part of the gas-liquid mixed fluid spirally turns into a laminar flow. This suppresses the generation of bubbles such as microbubbles and nanobubbles, and allows the gas-liquid mixed fluid to spiral smoothly in the processing space 4.

As a part of the gas-liquid mixed fluid spirals, a centrifugal force acts on the gas-liquid mixed fluid, and a cavity 7 is formed at the center of the spiral swirl of the liquid-liquid mixed fluid. Since the air pressure in the cavity 7 at the center of the swirl is approximately atmospheric pressure, the gas that is not dissolved in the gas-liquid mixed fluid is forced to gather in the cavity. In other words, air bubbles and the like are not mixed into the gas-liquid mixed fluid discharged from the processing space. Compared to a gas-liquid mixed fluid mixed with air bubbles, the amount of dissolved gas in a gas-liquid mixed fluid without air bubbles etc. decreases more slowly over time.

In addition, since the air pressure in the cavity is low, the pressure of the discharged water discharged from the discharge port can be prevented from rapidly decreasing and generating bubbles in the liquid.

<Second embodiment>
The gas dissolving device 101 of this embodiment differs from the gas dissolving device 1 of the first embodiment in the shape and position of the shearing part, but the other configurations are the same.

FIG. 5 is a diagram for explaining the configuration of the shearing section 131 provided in the processing space 4 of the gas dissolving apparatus 101 according to the second embodiment of the present invention in the front direction. FIG. 6 is a diagram for explaining the configuration of the shearing section 131 provided in the processing space 4 shown in FIG. 5 in the side direction.

As shown in FIG. 5, five shear sections 131-1 to 131-5 are provided in the processing space 4 at equal intervals in the circumferential direction of the processing space 4 when viewed from the front.
The shearing parts 31-1 to 31-4 are linear members.

As shown in FIG. 6, the five shearing parts 131-1 to 131-5 are arranged in a second horizontal direction perpendicular to the gravity direction and the first horizontal direction (left and right in FIG. direction).

The shearing parts 131-1 to 131-5 are tapered members that taper toward the center of the processing space 4.

The shearing parts 131-1 to 131-5 are provided between the outlet 5 and the outlet 6 in the processing space 4.

Similarly to the first embodiment, in the gas dissolving device 101, the gas-liquid mixed fluid is sheared by the shearing parts 31-1 to 31-4 in the process of flowing from the inlet 5 to the outlet 6 while spirally turning, and the gas is can be dissolved in liquid more efficiently.

The invention is not limited to the embodiments described above.
That is, those skilled in the art may make various changes, combinations, subcombinations, and substitutions with respect to the components of the above-described embodiments within the technical scope of the present invention or its equivalent scope.

The shape, number, and location of the shearing portions of the present invention are not limited to those shown in FIGS. 3 to 6 described above, as long as sufficient shearing force can be exerted.

In the above embodiment, the case where the cross section of the cylinder body 2 is a circular cylinder is described, but the cross section is not limited to this, and if a part of the gas-liquid mixed fluid can spirally turn in the processing space, the cross section can be changed. It may also be a polygonal cylinder.

Further, in the above embodiment, a case has been described in which the plate 3 is also a disk having a sufficient size to close both openings of the cylinder 2. However, the plate 3 is not limited to this, and the cylinder The plate may have any shape as long as it can close both openings.

Furthermore, in the above embodiment, a case has been described in which a part of the gas-liquid mixed fluid spirally turns into a laminar flow. There may be a flow.

Further, in the above embodiment, the gas dissolving device has the inlet 5 through which the gas-liquid mixed fluid, which is a mixture of gas and liquid, flows into the processing space 4. However, the gas dissolving device is not limited to this. A gas dissolving device is provided in the cylinder and a processing space consisting of a cylinder and a plate that respectively closes both openings of the cylinder so that the liquid flows into the process space independently. a liquid inlet that flows into the processing space; a gas inlet that is provided in the cylinder or the plate and allows gas to flow into the processing space; and a gas inlet that is provided in the cylinder and allows the liquid and the gas to flow into the processing space. a gas-liquid mixed fluid consisting of the liquid and the gas spirals in the processing space from the liquid outlet to the discharge port; Good too.

1... Gas dissolving device 2... Cylindrical body 3... Plate body 4... Processing space 5... Inlet port 6... Outlet port 7... Cavity 31-1 to 31-4... Shearing section 131-1 to 131-5... Shearing section

The present invention provides a processing space consisting of a cylinder whose cross section is approximately circular and whose central axis extends horizontally, and a plate that closes both openings of the cylinder, and a gas-liquid mixture in which gas and liquid are mixed. An inlet provided in the cylindrical body allows fluid to flow into the processing space from above to below; a plurality of linear members provided on the inner circumferential surface of the cylinder forming the processing space; a shearing section, the inlet and the outlet are provided at different positions in the direction of the central axis, and the plurality of shearing sections are arranged in a direction along the central axis and in a direction along the central axis. The gas dissolving device is provided at mutually different positions in the processing space in both directions orthogonal to the axis, and the plurality of shearing parts extend parallel to the direction of gravity, and both ends are fixed to the inner circumferential surface. It is.

Claims (9)

a processing space consisting of a cylinder and a plate that respectively closes both openings of the cylinder;
an inlet provided in the cylindrical body through which a gas-liquid mixed fluid in which gas and liquid are mixed flows into the processing space;
A gas dissolving device having an outlet provided in the cylindrical body and discharging the gas-liquid mixed fluid from the processing space,
A part of the gas-liquid mixed fluid spirals within the processing space from the outlet to the outlet,
A gas dissolving device, wherein a shearing section that applies a shearing force to the spirally rotating gas-liquid mixed fluid is provided in the processing space. a processing space consisting of a cylinder and a plate that respectively closes both openings of the cylinder;
a liquid inlet provided in the cylindrical body, through which liquid flows into the processing space;
a gas inlet provided in the cylindrical body or the plate body through which gas flows into the processing space;
an outlet provided in the cylindrical body for discharging the liquid and the gas from the processing space;
The gas dissolving device according to claim 1, wherein a part of the gas-liquid mixed fluid spirals within the processing space from the liquid inlet to the outlet. The gas dissolving device according to claim 1, wherein the shearing section has a shape protruding into the processing space from a casing that forms the processing space. The plurality of shearing parts are provided at different positions in the processing space in both the gravitational direction of the processing space and a first horizontal direction perpendicular to the gravitational direction. gas dissolving device. The gas dissolving device according to claim 4, wherein a plurality of the shearing parts are provided at further different positions in both the gravity direction and a second direction perpendicular to both the first horizontal direction. The gas dissolving device according to claim 4, wherein the plurality of shearing parts are linear members. The gas dissolving device according to claim 4, wherein the plurality of shearing parts are tapered members that taper toward the center of the processing space. The gas dissolving device according to claim 2, wherein the shearing section is located within the processing space between the liquid inlet, the gas inlet, and the outlet. 2. The gas dissolving device according to claim 1, wherein the spiral swirl of a portion of the gas-liquid mixed fluid is a laminar flow.