KR20050031002A - Impeller for gas and liquid mixing apparatus and gas and liquid mixing apparatus containing the same - Google Patents

Abstract

Provided are an impeller having different forms of holes and slots and an apparatus for mixing gas and liquid equipped with the impeller effective for continuous and abundant generation of micro pores during rotation of mixture and dissolution of gas in liquid for short time, thereby employing in various applications such as waste water treatment, fish farming, ice cream production, foaming resin manufacture, and etc. The impeller(10a) comprises a first disc type plate(11) having larger diameter, a second disc type plate(12) having smaller diameter at central portion of the first plate, a spring(16) spirally, concentrically and/or radially assembled on at least one side of the first plate as an element to increase contact of gas with liquid, and a hollow(13) in the central portion. The gas and liquid mixing apparatus comprises a driving pulley rotating by a driving shaft of a driving device, a slave pulley following the driving pulley via belt or chain, the impeller(10a) rotating by a slave shaft of the slave pulley. The impeller is fixed to the slave shaft by a key.

Description

IMPELLER FOR GAS AND LIQUID MIXING APPARATUS AND GAS AND LIQUID MIXING APPARATUS CONTAINING THE SAME}

The present invention relates to an impeller for a gas-liquid mixer and a gas-liquid mixer including the same, and more particularly, has a high efficiency to dissolve a large amount of gas in a liquid in a short time, while having a low noise and relatively low energy cost. The present invention relates to an impeller for a gas-liquid mixer and a gas-liquid mixer including the same, which require less and have a simpler structure, thereby making it easy to manufacture and maintain.

The gas-liquid mixer may be roughly classified into a screw or impeller rotating method using a motor and a pulsation type bubble generating method using a compressor depending on the processing method.

In addition, the gas-liquid mixer can be classified into batch type and continuous type according to the treatment type, and the batch liquid type has aerobic fermentation tank used for food and pharmaceutical fermentation, aeration tank used for waste water treatment, fish farm or Aberration-type aerators used in aquaculture farms, and the like, air mixing pumps and the like.

Gas-liquid mixers are widely used in food and pharmaceutical fermentation, wastewater treatment, fish farming and aquaculture, live fish transportation and storage, special purpose industries such as foaming resins, foam capture for egg whites and ice cream manufacturing, and household applications. have.

However, the conventional screw, impeller or water wheel rotation method has the advantages of relatively low noise and low energy cost, but the shape of the screw, impeller or water wheel does not deviate significantly from the conventional form. Since there is a serious problem that the gas dissolution efficiency is low, it is rarely used.

On the other hand, the conventional pulsation bubble generation using a compressor has the advantage that the gas dissolution efficiency is relatively high compared to the screw or impeller rotation method, but the most widely used conventionally, the pulsation noise is relatively large and consumes a lot of energy costs. There is a problem that the maintenance cost of the compressor is high, and in order to increase the dissolution efficiency of the gas, it is necessary to make the size of the bubble fine, but for this purpose, high load is required because the introduction gas must pass through a porous body having a plurality of fine pore sizes. There is a serious problem that the above problems are bound to be more severe.

Therefore, the gas-liquid mixer, which can continuously generate a large amount of fine bubbles, has a high efficiency of dissolving gas into a liquid, has a low noise, a relatively low energy cost, and a very simple configuration, which requires low initial installation and maintenance costs. It has long been desired in the art.

It is a first object of the present invention to provide an impeller for a gas-liquid mixer which can generate a large amount of fine bubbles continuously and thus has high efficiency of dissolving gas into liquid.

The second object of the present invention is to generate a large amount of fine bubbles in succession, while the dissolution efficiency of the gas to the liquid is high while the noise is relatively low, the configuration is simple, the initial installation cost is low, there is almost no failure, easy to replace the impeller It is to provide a gas-liquid mixer having good maintainability that is low and requires low energy costs.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, in the present invention, the term gas-liquid mixer includes both the 'aberration' of the modified form in which part of the impeller is submerged in the liquid and the part of which is exposed in the gas, and the 'pump' in which the whole of the impeller is deposited in the liquid. It is defined in the sense, and may be any one of a screw or impeller rotation method by a motor, and a mixing method by a motor and a compressor (pulsation type bubble generation method).

In addition, the term gas-liquid in the present invention generally means 'air and water', but the present invention is not limited thereto, and oxygen, carbon dioxide, or other types of gases, ethanol, polymers, and the like. It is necessary to understand the meaning including all types of liquids such as mixed liquids such as resin liquid, wastewater containing solids, and the like.

Fig. 1A is a perspective view of a gas-liquid mixer 1a according to a preferred embodiment of the present invention. The gas-liquid mixer 1a according to the present invention in the illustrated example is basically a motor as the driving means 2, and the like. It consists of the impeller 1a of this invention.

In the illustrated example, the driven pulley 5 rotated by the drive shaft 3 of the drive means 2, the driven pulley 8 driven by the belt or chain 6, and the driven shaft of the driven pulley 8 It consists of the impeller 1a of this invention rotating by (7). The driving pulley 5 and the driven pulley 8 are fixed to the drive shaft 3 and the driven shaft 7 by the key 9a, respectively, and the impeller 1a of the present invention is driven by the key 9b. 7) is fixed.

In FIG. 1A, the drive pulley 5 and the driven pulley 8 are connected by a belt or a chain 6, and the motor is on a floating surface (not shown) such as a board or the like, or on the surface of a liquid such as an iron beam. While being positioned above the water surface (surface of the liquid) by fastening means (not shown), the driven pulley 8 is partly positioned below the water surface (surface of the liquid).

However, the configuration of the present invention is not limited to this, and can be configured to adopt a suitable means such as a liquid-tight reduction gear box (not shown), and of course, after connecting the impeller directly to the motor, the impeller 10a It is also possible to install the motor inclined so that a part of) is in the liquid, which is also within the scope of the present invention.

Reference numeral 4 in the drawings is a switch box.

Next, referring to FIG. 1B, which is a perspective view of the impeller 10a according to the first embodiment of the present invention, the first disc 11 having a relatively large diameter and the relatively small portions located at the centers of the upper and lower surfaces thereof, respectively. Spring as gas-liquid contact increasing means arranged in a spiral or concentric or radial manner, which is fixed by a fixing method such as spot welding or the like on at least one surface of the second disk 12 having a diameter and the first disk. It consists of (16), and the axial hole 13 is formed in the center of the said 1st disc body 11 and the 2nd disc body 12. As shown in FIG. In this impeller 10a according to the first embodiment of the present invention, the contact area with gas and liquid (eg, water and air) is significantly increased, and as the gas and liquid are captured in the spring 16 during rotation thereof, Simultaneously with thorough stirring, bubbles are refined so that the dissolution of the gas into the liquid can be effectively carried out.

2A is a partial cross-sectional plan view of a gas-liquid mixer 2a according to another preferred embodiment of the present invention, wherein the gas-liquid mixer 2a according to the present invention in the illustrated example is basically a driving means 2. And a housing 30 for accommodating a motor as an impeller 10b according to the second embodiment of the present invention, a gas introduction pipe 36, and a screw and an impeller 10b.

In the illustrated example, the cylindrical impeller 10b according to the second embodiment of the present invention rotated by the drive shaft 3 of the drive means 2 is accommodated in the impeller receiving portion 33 of the housing 30 and pumped. A screw or impeller (not shown) is accommodated in the screw accommodating portion 35 of the housing 30, and the gas introduction pipe 36 is disposed between the impeller accommodating portion 33 and the screw accommodating portion 35. Located. Meanwhile, the shaft hole 34 is formed in the impeller receiving portion 33 of the housing 30.

Therefore, the liquid is introduced through the inlet pipe 32 by the rotation of the pumping screw or the impeller (not shown) of the housing 30, and then introduced through the gas introduction pipe 36 by a compressor (not shown). Along with the gas to be agitated by the rotating impeller (10b) and at the same time the bubbles are finely broken so that the contact area between the liquid and the gas is increased, so that the rate of dissolution of the gas into the liquid can be significantly improved.

In the example shown, the drive means 2 is located above the liquid surface and the housing 30 is located in the liquid.

Next, referring to FIG. 2B, which is a perspective view of the impeller 10b according to the second embodiment of the present invention, the cylindrical body 14 and the axial hole forming rod 15 inserted into one end thereof and the cylindrical body 14 described above. It consists of a spring 16 as gas-liquid contact augmentation means wound on at least a portion of the outer surface of the surface by means of fixing means such as spot welding or the like, arranged in a strip.

The impeller 10a according to the second embodiment of the present invention also has a significantly increased contact area with gas and liquid (eg, water and air), and as the gas and liquid are trapped in the spring 16 during its rotation. Simultaneously with thorough stirring, bubbles are refined so that the dissolution of the gas into the liquid can be effectively carried out.

The first and second disc bodies 11 and 12 or the cylinder body 14 and the shaft-forming rod body 15 in the impellers 10a and 10b according to the first and second embodiments of the present invention described above are integrally formed. Or by inserting and fixing two parts, and the material may be formed of a metal material, a resin material, a wood, a ceramic material, and the like, and fixing the various types of gas-liquid mixing means such as the spring 16 to the same. The method may be appropriately selected depending on the material, and the fixing method itself may be appropriately selected by those skilled in the art.

Next, a description will be made in order with respect to Figs. 3 to 10, which are impellers 10c to 10o according to the third to fifteenth embodiments of the present invention, which can be preferably applied to the gas-liquid mixer 1a or 2a of the present invention. ) Are perspective views.

First, FIGS. 3 and 4 are perspective views of impellers 10c and 10d according to the third and fourth embodiments of the present invention, which may be preferably applied to the gas-liquid mixer 1a of the present invention, respectively. Let's do it.

Since the basic configuration and operating principle of the impellers 10c and 10d according to the third and fourth embodiments of the present invention are substantially the same as those of the impellers 10a and 10b according to the first and second embodiments, only the differences are mainly used. Let's explain.

The impeller 10c according to the third embodiment of the present invention includes a disk 12 having a central portion (an axial hole (not shown) is formed at its bottom) and a plurality of waveforms extending radially outward from its outer periphery. The above-described corrugated strip 17 composed of strips 17 and extending radially may be formed in a plurality of rows.

The impeller 10d according to the fourth embodiment of the present invention has a corrugated disc body 18 in which a shaft hole (not shown) is formed in the center, a plurality of through holes 19 are formed, and the outer surface thereof is formed in a wave shape. Is formed.

Since the impellers 10c and 10d according to the third and fourth embodiments have increased contact areas with liquid and air, both the gas and the liquid are thoroughly stirred at the time of rotation thereof, and the bubbles are made fine, so that the gas for the liquid Can be effectively dissolved.

5A to 5C are perspective views of impellers 10e, 10f and 10g according to the fifth to seventh embodiments of the present invention, which can be preferably applied to the gas-liquid mixers 1a and 1b of the present invention, respectively. Since they are similar, they will be described together.

Since the basic configuration and operating principle of the impellers 10e, 10f, 10g according to the fifth to seventh embodiments of the present invention are substantially the same as the impeller 10b according to the second embodiment, only the differences will be mainly described. do.

First, the impeller 10e according to the fifth embodiment of the present invention includes a shaft hole-forming rod body 15, a first disc body 11 inserted into and fixed to an area adjacent to one end thereof, and an insertion end fixed to the other end thereof. It consists of the 2nd disc body 12 which is spaced apart from the 1st disc body 11 by predetermined distance, and the several spring 16 arrange | positioned perpendicularly between the said 1st and 2nd disc bodies 11 and 12. do.

In the impeller 10e according to the fifth embodiment, the contact area between the liquid and the air is increased, so that the gas and the liquid are thoroughly stirred at the time of rotation, and the bubbles are refined, thereby effectively dissolving the gas into the liquid. have.

Subsequently, the impeller 10f according to the sixth embodiment of the present invention includes the axial hole forming rod 15, the first disc body 11 inserted into and fixed to one end thereof, and the surface of the first disc body 11 described above. Each of the plurality of rod bodies 20 and the second disc body 12 fixed to be spaced apart from the first disc body 11 by a plurality of rods 20 extending vertically upwards It consists of the spring 16 wound by the outer surface.

Since the impeller 10f according to the sixth embodiment also has an increased contact area with the liquid and air, the gas and the liquid are thoroughly stirred during the rotation and the bubbles are fined, so that the dissolution of the gas into the liquid can be effectively performed. have.

In the impeller 10g according to the seventh embodiment of the present invention, a plurality of springs 16 fixedly connected between the first disc body 11 and the second disc body 12 are arranged in parallel or staggered in an oblique direction. Except that, since the configuration is essentially the same as the impeller 10e of the fifth embodiment, further description will be omitted.

6 and 7 are perspective views of the impellers 10h and 10i according to the eighth and ninth embodiments of the present invention, which can be preferably applied to the gas-liquid mixers 1a and 1b of the present invention, respectively. Since is substantially the same as the above-described examples will be mainly described only the difference.

First, the impeller 10h according to the eighth embodiment of the present invention extends vertically from the upper surface of the disc-shaped rod body 15, the disc body 11 fixed to one end thereof, and the disc body 11. It is composed of a plurality of springs 16, as in the case described above, the contact area with the liquid and air is increased, so that the gas and liquid is thoroughly stirred during rotation and at the same time the bubbles are micronized to effectively dissolve the gas to the liquid You can do it.

The impeller 10i according to the ninth embodiment of the present invention includes a disc body 11 having a shaft hole-forming rod body 15, a disc body 11 having the rim 21 penetrated therethrough, and a disc. It consists of a plurality of springs 16 arranged radially between the inner circumferential surface of the rim 21 of the sieve 11 and the outer circumferential surface of the axial hole forming rod 15. The springs 16 may, for example, be arranged alternately staggered or coincidentally in a plurality of rows up and down together with the other springs 16a.

8A to 8C are perspective views of the impellers 10j, 10k, 10l according to the tenth to twelfth embodiments of the present invention, which can be preferably applied to the gas-liquid mixers 1a and 2a of the present invention, and are mutually similar in structure. Since the basic configuration and operating principle thereof are substantially the same as the impeller 10b according to the second embodiment, only the differences will be mainly described.

First, the impeller 10j according to the tenth embodiment of the present invention illustrated in FIG. 8A includes a cylindrical body 14 in which a shaft hole 13 is formed, and a plurality of flat plates formed along a longitudinal direction on the outer peripheral surface thereof. The upper blade 22 is configured, and in the illustrated example, four wings 22 are vertically formed on the outer surface of the cylindrical body 14 along its longitudinal direction.

The wing 22 is formed with a plurality of through holes 19 or slots 23 to increase the contact area between the gas and the liquid, or to fix the spring 16 to both surfaces thereof, or to the opening 24 ), And the spring 16 can be fixed in the longitudinal direction or perpendicular to the opening 24 or in a mesh arrangement or the like.

On the other hand, the through hole 19 may be formed in any of a variety of shapes, such as circle, triangle, square, pentagon, hexagon.

Here, it should be noted that, FIG. 8A is only one example of various examples for convenience of illustration, and in actual application, only one of the above-described examples may be selected or formed for balance during rotation. It is also possible to form branches symmetrically.

The impeller 10k according to the eleventh embodiment of the present invention illustrated in FIG. 8B includes a cylindrical body 14 in which shaft holes 13 are formed, and a plurality of curved wings formed in a longitudinal direction on the outer circumferential surface thereof. In the illustrated example, four curved wings 22 are vertically formed on the outer surface of the cylindrical body 14 along its longitudinal direction, and each wing 22 has an area for increasing the gas-liquid contact area. The example in which many circular through holes 19 are formed is shown.

However, since the impeller 10k according to the eleventh embodiment has the same configuration as the impeller 10j according to the tenth embodiment of the present invention shown in FIG. 8A except that the blade 22 is curved, FIG. As a matter of course, various examples of the gas-liquid contact increasing means as shown in FIG. 8A may be selected and formed.

Subsequently, the impeller 10L according to the twelfth embodiment of the present invention shown in FIG. 8C has a cylindrical body 14 having a shaft hole (formed at one end of the bottom and not shown) and a longitudinal direction on the outer peripheral surface thereof. It consists of a plurality of curved wings 22 are formed to be twisted to have an inclined gradient, in the illustrated example four curved wings 22 having an inclined gradient are formed on the outer surface of the cylindrical body 14 Each wing 22 shows an example in which a plurality of circular through holes 19 are formed for increasing the gas-liquid contact area.

The impeller 10L according to the twelfth embodiment described above is similar to the tenth and eleventh embodiments of the present invention shown in FIGS. 8A and 8B except that the wing 22 is a curved shape having a warp gradient. Since the configuration is substantially the same as the impellers 10j and 10k according to the related art, various examples of the gas-liquid contact increasing means as shown in FIG. 8A may be selected to form the vanes 22.

The impellers 10j to 10L according to the tenth to twelfth embodiments have also increased contact areas with liquid and air, so that the gas and liquid are thoroughly stirred at the time of rotation thereof, and the bubbles are made fine, thereby dissolving the gas into the liquid. Can be done effectively.

9A and 9B are perspective views of impellers 10m and 10n according to the thirteenth and fourteenth embodiments of the present invention, which may be preferably applied to the gas-liquid mixers 1a and 2a of the present invention, and are mutually similar in structure. Since the basic configuration and the operating principle are substantially the same as the impellers 10a and 10b according to the first and second embodiments, only the differences will be mainly described.

The impeller 10m according to the thirteenth embodiment of the present invention has a form similar to a brush formed of an axial hole forming rod 15 and a plurality of steel wires 25 extending radially forward in a plurality of rows from one end thereof. The impeller 10n according to the fourteenth embodiment of the present invention includes a shaft hole-forming rod body 15 having a shaft hole 13 and a plurality of steel wires 25 extending radially outwardly in a plurality of rows from an outer peripheral surface of one end thereof. It is similar in form to a brush.

As in the case described above, the contact area between the liquid and the air is increased, so that the gas and the liquid are thoroughly stirred at the time of rotation, and the bubbles are made fine, so that the gas can be dissolved in the liquid effectively.

FIG. 10 is a perspective view of an impeller 10o according to a fifteenth embodiment of the present invention, which may be preferably applied to the gas-liquid mixers 1a and 1b of the present invention, wherein the impeller 10o according to the fifteenth embodiment is a shaft hole 13. Axial hole-forming rod body (15), a disc body (11) inserted into and fixed at one end thereof, and a plurality of arch rods (20) formed to cross each other in an arch shape from the surface of the disc body (11). And a spring 16 wound on the arcuate rod 20 described above.

Since the impeller 10o according to the fifteenth embodiment also has an increased contact area with liquid and air, the gas and liquid are thoroughly stirred at the time of rotation, and the bubbles are fined, so that the dissolution of the gas into the liquid can be effectively performed. have.

As described above, the gas-liquid mixer including the impeller for the gas-liquid mixer according to the present invention can generate a large amount of fine bubbles continuously and has a relatively low noise while having high efficiency to dissolve a large amount of gas in a liquid in a short time. In addition, it takes less energy and energy costs, and has a simple structure, low initial installation cost, almost no breakdown, and easy replacement of impeller. , Fish farming and aquaculture, live fish transportation and storage, special purpose industries such as foamed resin production, foam capture for egg whites and ice cream production, and household applications.

1A is a perspective view of a gas-liquid mixer according to one preferred embodiment of the present invention.

FIG. 1B is a perspective view of the impeller according to the first embodiment of the present invention, which may be preferably applied to the gas-liquid mixer of FIG. 1A.

2A is a partial cross-sectional plan view of a gas-liquid mixer according to another preferred embodiment of the present invention.

FIG. 2B is a perspective view of a similar type impeller according to a second embodiment of the present invention, which may be preferably applied to the gas-liquid mixer of FIG. 2A.

3 and 4 are perspective views of the impeller according to the third and fourth embodiments of the present invention, which can be preferably applied to the gas-liquid mixer of the present invention.

5A to 5C are perspective views of impellers according to the fifth to seventh embodiments of the present invention, which can be preferably applied to the gas-liquid mixer of the present invention.

6 and 7 are perspective views of the impeller according to the eighth and ninth embodiments of the present invention, which can be preferably applied to the gas-liquid mixer of the present invention.

8A to 8C are perspective views of impellers according to tenth to twelfth embodiments of the present invention, which can be preferably applied to the gas-liquid mixer of the present invention.

9A and 9B are perspective views of impellers according to thirteenth and fourteenth embodiments of the present invention, which can be preferably applied to the gas-liquid mixer of the present invention.

10 is a perspective view of an impeller according to a fifteenth embodiment of the present invention, which can be preferably applied to the gas-liquid mixer of the present invention.

-Explanation of symbols for the main parts of the drawings-

1a, 1b: Gas-liquid mixer according to a preferred embodiment of the present invention

2: drive means 3: drive shaft

4: switch box 5: drive pulley

6: belt or chain 7: driven shaft

8: driven pulley 9a, 9b: key

10a to 10o: impeller according to a preferred embodiment of the present invention

11: (1) disc 12: (2) disc

13: axle 14: cylinder

15: Axial hole forming rod 16, 16a: Spring (gas-liquid contact increasing means)

17: corrugated strip 18: corrugated disk

19: through-hole (gas-liquid contact increasing means) 20: rod body

21: figure 22: wings

23: slot (gas-liquid contact increasing means) 24: opening

25: steel wire (gas-liquid contact increasing means)

30: housing 31: gas-liquid mixing outlet

32: water pipe 33: impeller receiving portion

34: axle 35: screw accommodating part

36: gas introduction tube

Claims (18)

First disc body 11; A second disc body 12 having a smaller diameter than the center of the first disc body 11; And Consisting of gas-liquid contact increasing means 16 arranged spirally, concentrically or radially fixed on at least one surface of said first disc body Impeller 10a for gas-liquid mixers. Cylindrical body 14; A shaft hole-forming rod body 15 inserted into one end of the cylindrical body 14; And Consisting of gas-liquid contact increasing means 16 wound on at least a portion of the outer surface of the cylindrical body 14 or arranged in a strip. Impeller 10b for gas-liquid mixers. The gas-liquid mixing impeller (10a, 10b) according to claim 1 or 2, wherein the plurality of gas-liquid contact increasing means (16) are springs. Disc 12; And Consists of a plurality of corrugated strips 17 of upper and lower rows extending radially outward from the outer circumference of the disk 12 Impeller 10c for gas-liquid mixer. An impeller (10d) for a gas-liquid mixer consisting of a corrugated disk body (18) having a shaft hole formed in the center thereof, a plurality of through holes (19) formed, and an outer surface thereof formed in a wave shape. A shaft hole forming rod 15; A first disc body 11 inserted into and fixed to an area adjacent to one end of the shaft hole-forming rod body 15; A second disc body 12 inserted into and fixed to the other end of the shaft hole-forming rod body 15 and spaced apart from the first disc body 11 by a predetermined distance; And Composed of a plurality of gas-liquid contact increasing means 16 arranged between the first and second disc bodies 11 and 12 described above. Impellers for gas-liquid mixers (10e, 10f, 10g). 7. The gas-liquid mixer impeller (10e, 10f) according to claim 6, wherein the plurality of gas-liquid contact increasing means (16) is a spring, and is formed vertically or inclined between the first and second disc bodies (11, 12). , 10 g). 8. The impeller (10e, 10f, 10g) according to claim 7, wherein a rod (20) is located inside each of the plurality of springs. A shaft hole forming rod 15; A disc body 11 fixed to one end of the above-described shaft hole forming rod 15; And Consists of a plurality of gas-liquid contact increasing means 16 extending vertically from the upper surface of the disk 11 Impellers for gas-liquid mixers 10h and 10i. A shaft hole forming rod 15; A disc body 11 having the axial hole forming rod 15 fixed therethrough and having a rim 21; And With a plurality of gas-liquid contact increasing means (16) arranged in at least one row up and down radially arranged between the inner circumferential surface of the rim 21 of the disc body 11 and the outer circumferential surface of the axial hole-forming rod body (15). Constituted Impeller 10i for gas-liquid mixers. A cylindrical body 14 in which a shaft hole 13 is formed; And A plurality of vanes 22 are formed along the longitudinal direction on the outer circumferential surface of the cylindrical body 14, and a plurality of gas-liquid contact increasing means 16, 19, 23 are formed to increase the contact area between the gas and the liquid. Composed of Impellers for gas-liquid mixers (10j, 10k, 10 l). The impeller (10j, 10k, 10L) according to claim 11, wherein the gas-liquid contact increasing means (16, 19, 23) is a spring, a through hole, or a slot. The impeller (10j, 10k, 10L) according to claim 11 or 12, wherein the vanes (22) are flat, curved, or twisted curved with an inclined gradient. A shaft hole forming rod 15; And Consists of a plurality of steel wires (25) extending radially in a plurality of rows from one surface or the outer peripheral surface of the one end of the shaft hole-forming rod body 15 Impellers for gas-liquid mixers (10m, 10n). A shaft hole forming rod 15; A disk body 11 inserted into and fixed to one end of the shaft-forming rod body 15; A plurality of arcuate rods (20) formed to cross each other in an arc shape from the surface of the disc body (11); And Consisting of the spring 16 as the gas-liquid contact means wound around the arcuate rod 20 Impeller for gas-liquid mixer (10o). Drive means 2; And Claims 1 or 2 or 4 to 6 or any one of claims 9 to 11 or any one of the impeller (10a to 10o) according to claim 14 or 15 and : Some of the impellers 10a to 10o described above remain deposited in the liquid and some remain exposed to the gas. Gas-liquid mixer 1a. 17. The gas-liquid mixer (1a) according to claim 16, wherein the rotation of the impellers (10a to 10o) by the drive means (2) is carried out by belts or chains (6) or reduction gear boxes. Drive means 2; The impeller (10b, 10e to 10L, 10m, according to any one of claims 2 or 6 or 9 to 11 rotated by the drive means 2, or 14 or 15). 10o); Impellers (10b, 10e to 10l, 10m, 10o) and screws as described above, and gas inlet tube (36) located between them, inlet tube (32) and gas-liquid mixed outlet tube (31): The gas introduced through the inlet pipe 32 and the gas introduced through the gas introduction pipe 36 by the rotation of the screw is stirred by the impellers 10b, 10e to 10L, 10m, 10o and at the same time Gas-liquid mixer 2a in which is dissolved in a liquid.