JPH10314560A - Insoluble gas dissolving equipment - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a low-solubility gas-dissolving apparatus which is inexpensive, compact, and can increase gas solubility. SOLUTION: A rotating shaft 201 has a plurality of impellers 202.
a and 202b are attached to form an independent pump chamber corresponding to each impeller, and a connecting pipe 2 connecting a discharge port 204b of the first pump chamber 204 and a suction port 205a of the second pump chamber 205.
In the first pump chamber 204, the liquid supplied from the liquid supply device 1 is pressurized and discharged to the communication pipe 206, and the gas from the gas supply device 3 is injected into the communication pipe 206. The liquid and the gas are mixed and dispersed while the pressure is increased again in the second pump chamber 205, and the second pump chamber 205
And a stirrer and dissolver with a static mixer 4 connected to the discharge port of the gas dissolving apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact gas dissolving liquid supply apparatus for supplying a dissolving liquid in which a liquid having low solubility in water such as ozone is uniformly dissolved, and particularly to a dissolving liquid supply for a hardly soluble gas. To a device suitable for:

[0002]

2. Description of the Related Art Conventionally, when a hardly soluble gas such as ozone is mixed with a liquid such as water and supplied as a gas solution, a first pump is used to prevent cavitation and enhance solubility. The pressurized liquid was injected, and the gas-liquid mixed solution was supplied by the second pump.

For example, Japanese Utility Model Laid-Open No. 6-48825 shown in FIG.
The absorption transfer pump 7 and the liquid transfer pump 8 are arranged in series, a stationary mixer 10 is installed on the discharge side of the absorption transfer pump 7, and a gas is provided between the absorption transfer pump 7 and the liquid transfer pump 8. In this configuration, an inlet 9 is provided. Then, the liquid discharged from the liquid transfer pump 8 and the gas supplied from the gas inlet 9 are mixed by the stationary mixer 10 through the absorption transfer pump 7 to absorb the gas into the liquid.

[0004]

In the above prior art, there are problems that two or more pumps are required, the apparatus becomes expensive, and the whole apparatus is enlarged to require a large space. Also, the mixing and solubility were not satisfactory.

[0005] Therefore, an object of the present invention is to provide a low-cost, compact, hardly soluble gas dissolving apparatus with high gas solubility in order to solve such problems.

[0006]

In order to achieve the above object, the present invention employs the following means. In claim 1,
In a hardly-soluble gas dissolving device including a liquid supply device, a gas supply device, and a gas-liquid mixing pump, the gas-liquid mixing pump rotates an impeller mounted on a rotating shaft in a pump chamber to form a pump chamber. A plurality of impellers are mounted on the rotating shaft to form independent pump chambers corresponding to the respective impellers, and a discharge port of the first pump chamber is provided. And a communication pipe connecting the suction port of the second pump chamber and the first pump chamber. In the first pump chamber, the liquid supplied from the liquid supply device is pressurized and discharged to the communication pipe. Injecting the gas from the gas supply device, mixing and dispersing the liquid and the gas while increasing the pressure again in the second pump chamber, and performing stirring and dissolution by a static mixer connected to the discharge port of the second pump chamber. To be A soluble gas dissolution apparatus means. The first pump chamber has a function of increasing the pressure of the liquid supplied from the liquid supply device by the rotation of the impeller path, and smoothly mixing the gas and the liquid injected through the connecting pipe. Next, the first
The second pump chamber provided adjacent to the pump chamber functions to stir and pressurize the gas and the liquid and guide the gas solution to the subsequent static mixer. The static mixer further stirs and dissolves the gas solution to increase the solubility. According to a second aspect, the gas-liquid mixing pump is of a cascade type.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a simplified flow chart of one embodiment according to the present invention, FIG. 2 is a side view in which a part of a gas-liquid mixing pump used in the embodiment is cut away, and FIG. And FIG. 4 is a schematic cross-sectional view when the inside of the pump is viewed from directly above.

First, an outline of this embodiment will be described with reference to FIG.

In the present embodiment, the liquid supply device 1 is a liquid (water) tank, which is connected to the first pump chamber 204 of the gas-liquid mixing pump 2 and is supplied from the liquid supply device 1. Water is pressurized in the first pump chamber 204. On the other hand, the gas supply device 3 is an ozone generator in the present embodiment, and the first
Connecting pipe 2 connecting pump chamber 204 and second pump chamber 205
06 (see FIGS. 3 and 4).

That is, the water pressurized in the first pump chamber 204 is guided to the second pump chamber 205 along with the ozone injected from the gas supply device 3 in the middle of the communication pipe 206. In the second pump chamber 205, the pressure is further increased and water and ozone are mixed and dispersed. The ozone-dissolved water thus obtained is further stirred and dissolved by the static mixer 4 connected to the second pump chamber 205, and is discharged after increasing the solubility.

Next, a gas-liquid mixing pump 2 according to this embodiment will be described in detail with reference to FIGS. 2, 3 and 4. FIG.

First, reference numeral 203 shown in FIG. 2 denotes a casing for forming the pump chambers 204 and 205.
a is a casing fixed to the motor side of the gas-liquid mixing pump main body 210, 203b is an intermediate casing, 203c
Is a cover casing. And the casing 203
A first pump chamber 204 is formed between b and 203c, and a second pump chamber 205 is formed between the casings 203a and 203b independently of each other.

At the periphery of the first pump chamber 204, there are formed a suction port 204a connected to the liquid supply device 1 for introducing water and a discharge port 204b for discharging pressurized water to the communication pipe 206. 4). Similarly, the second pump chamber 205
Are formed with a suction port 205a connected to the communication pipe 206 and a discharge port 205b connected to the static mixer 4 (see FIG. 4). Further, a gas injection pipe 207 is attached to a middle part of the communication pipe 206 in connection with a pipe 6 (see FIG. 1) for feeding ozone generated by the gas supply device 3 (see FIGS. 3 and 3). 4).

Here, reference numeral 201 denotes a rotating shaft installed through the casings 203a, 203b, and 203c, and also a rotating shaft of a motor (not shown) housed in the pump body 210. The rotation shaft 201 is
The bearing 212 is formed inside the pump body 10, and is supported by metal bearings 214 and 215 formed on the intermediate casing 203b and the cover casing 203c, respectively (see FIGS. 2 and 4).

An impeller 202 is fixedly provided on the rotary shaft 201 at a predetermined interval in the axial direction. The impeller 202 is provided inside the first pump chamber 204.
a, an impeller 202b is provided inside the second pump chamber 205,
Each is rotatably disposed integrally with the rotation shaft 201 (see FIGS. 2 and 4).

A number of blades are formed on the periphery of the impeller 202, and grooves (not shown) are formed between the blades. The rotation of the impeller 202 causes the pump chambers 204, The water in each of the 205
4a (or 205a) is carried to the discharge port 204b (or discharge port 205b). This effect is due to the usual friction pump (also called waist pump or cascade pump)
Is the same as

In this embodiment, a plurality of impellers 202 are provided on one rotating shaft 201, and a plurality of pump chambers 204 and 205 are provided adjacent to each other. In addition, it is possible to efficiently mix gas and liquid.

When mixing a hardly soluble gas such as ozone with water transferred from the liquid supply device 1, the ozone pressurized by appropriate means is injected from the gas injection pipe 207 of the communication pipe 206, and water is injected. Since ozone is injected into the water pressurized in the first pump chamber 204, the ozone is mixed smoothly because high solubility can be secured.
No cavitation.

Further, the water into which ozone has been injected is further stirred and pressurized in the second pump chamber 205, and then transferred to the static mixer 4 (see FIGS. 1 and 2) through the discharge port 205b. By further stirring in step 4, ozone water having high solubility can be obtained.

In this embodiment, the impeller 202
When two or more different gases are mixed, or when two or more different gases are mixed into one liquid, three or more impellers 202 are provided and divided into two or more stages. It is also possible to inject gas.

In the gas-liquid mixing pump of the above embodiment, a thin type used for a friction pump is adopted as the impeller 202, but a similar gear pump such as a so-called gear pump using a gear as the impeller is used. It is also possible to apply to other types of pumps having a pump function.

[0023]

The effects of the invention disclosed by the present application will be described below.

The present invention has a structure in which a plurality of impellers are fixed to one rotating shaft of a gas-liquid mixing pump, and the impellers are respectively disposed in a plurality of pump chambers formed between casings. By adopting the apparatus, the apparatus is compact, does not require a large space, is inexpensive, and enables efficient mixing of gas and liquid with one apparatus.

Further, when mixing a hardly soluble gas such as ozone with water transferred from the liquid supply device, an independent first pump chamber and a second pump chamber formed in a gas-liquid mixing pump are provided.
Since a means for injecting ozone pressurized by an appropriate means into the connecting pipe connecting the pump chamber and mixing it with water is employed, ozone is injected into the water pressurized in the first pump chamber, resulting in high ozone. Solubility can be ensured and the mixture is mixed smoothly without cavitation.

Furthermore, since a statics mixer is connected to the discharge port of the second pump chamber, the dissolved water of a hardly soluble gas such as ozone discharged from the second pump chamber is further stirred and dissolved, thereby increasing the solubility. Can be further enhanced,
Effective dissolved water such as ozone having high solubility can be obtained.

[Brief description of the drawings]

FIG. 1 is a simplified flow diagram of one embodiment according to the present invention.

FIG. 2 is a side view in which a part of a gas-liquid mixing pump used in the embodiment is cut away

FIG. 3 is a front view of the pump with a part cut away.

FIG. 4 is a schematic sectional view when the pump is viewed from directly above.

FIG. 5 is a schematic flow diagram of a hardly soluble gas dissolving apparatus showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid supply apparatus 2 Gas-liquid mixing pump 3 Gas supply apparatus 4 Statics mixer 201 Rotating shaft 202 Impeller 204 1st pump chamber 204a Suction port of 1st pump chamber 204b Discharge port of 1st pump chamber 205 2nd pump chamber 205a Suction port of the second pump chamber 205b Discharge port of the second pump chamber 206 Communication pipe

Claims (2)

[Claims] An insoluble gas dissolving apparatus comprising a liquid supply device, a gas supply device, and a gas-liquid mixing pump, wherein the gas-liquid mixing pump rotates an impeller attached to a rotating shaft in a pump chamber. A pump for sucking liquid from a suction port formed in a pump chamber and sending it out from a discharge port, wherein a plurality of impellers are attached to the rotating shaft to form independent pump chambers corresponding to the respective impellers; A communication pipe connecting a discharge port of the pump chamber and a suction port of the second pump chamber; and in the first pump chamber, a liquid supplied from the liquid supply device is pressurized and discharged to the communication pipe. Injecting the gas from the gas supply device into the connecting pipe, mixing and dispersing the liquid and the gas while increasing the pressure again in the second pump chamber, and stirring and dissolving with a static mixer connected to the discharge port of the second pump chamber. Do this Low solubility gas dissolution apparatus according to claim. 2. The apparatus according to claim 1, wherein the gas-liquid mixing pump is of a cascade type.