TW201343564A - Aeration and air stripping using high frequency vibration - Google Patents

Abstract

A hollow sonotrode and a high frequency device having the same are disclosed. The output surface of the hollow sonotrode has the characteristics of hollows. This hollow sonotrode has a large output surface with a high displacement. Due to the high displacement of the hollow sonotrode's output surface that effectively atomizes the liquid into tiny droplets with small diameter, a high frequency device with plural number of hollow sonotrodes can efficiently perform the aeration and air stripping.

Description

High frequency vibration as a device for aeration and stripping

The present disclosure relates to a depressed sound pole and a high frequency vibration device thereof, particularly a recessed sound pole combined with aeration and blowing operation and a high frequency vibration device thereof.

High-intensity ultrasonics (usually referred to as vibrations with frequencies above 20 kHz) are extremely versatile, such as cleaning, emulsifying, mixing, dispersing, atomizing, material cutting, fabric cutting, drilling, machining, plastic welding, metal welding, Atomization, cell destruction, various types of materials or object damage, etc., can use high-speed ultrasonic high-speed motion to achieve its working effect. In the above applications, in order to achieve high high-speed motion, it is desirable to have a large displacement magnification (output surface displacement/input surface displacement) in the design of ultrasonic horn (sonotrode) to meet the working requirements. effectiveness. In the conventional ultrasonic sound pole design, it is mostly longitudinal motion, and its shape is mostly stepped, exponential, conical, Fourier, Catenoidal, B. A zier shape, or a combination design of the above type, in a design of the above type or a combination thereof, or a folded sonotrode of a small size that is converted into a bending vibration design using a longitudinal vibration. Used as a space for rock drilling; or for the purpose of obtaining a flat, large-size output surface, the ultrasonic sonic of a lateral slot. As shown in FIG. 1 , in order to increase the displacement of the output end 4 of the sonotrode, the area of the output end 4 region is reduced to increase the displacement amplification ratio, but the above-mentioned ultrasonic sonotrode will cause its output after the displacement is amplified. The working area of the end 4 is reduced. Therefore, the prior art is often used in small-scale partial solid or water body processing operations, such as cutting, plastic welding, drilling, wire bonding in the IC industry, ocular emulsification, scalpel, and the like. Another example is that a conventional ultrasonic nebulizer uses a small piezoelectric atomizing device with a frequency ranging from 1 MHz to 3 MHz in order to obtain droplets in the range of micrometers to tens of micrometers. Smaller piezo atomizers with a frequency range of 60 kHz to 80 kHz combined with a tens of micron aperture diaphragm with a working diameter of less than 10 mm. The above-mentioned ultrasonic atomizing device has a small working area and a low atomization amount, and is only suitable for treatment of respiratory diseases or as a humidification device for a small range of home environment, and has a daily flow rate of several metric tons or more and impurities. It is difficult for sewage to carry out the atomization function.

Aeration and air stripping (Aeration and air stripping) is to dissolve the gas into the water body, or to drive the dissolved gas out of the water body. The aeration method can be roughly divided into: air is sent into the water body through the arranged diffusion device, At this time, the gas is a discontinuous phase, the water body is a continuous phase, or the water body is dispersed into the atmosphere through the arranged diffusion device. At this time, the water body is a discontinuous phase, and the gas is a continuous phase. Aeration is widely used in water and wastewater treatment projects, such as the oxygen transfer system of aerobic biological treatment systems for wastewater treatment, to remove organic matter that can be biodegraded in sewage, or to use aeration in aerated grit chambers. Achieve the effect of mixing and mixing, and prevent the sewage from spoiling, or use aeration to remove volatile organic compounds (VOCs) or pollutants in sewage or groundwater, such as ammonia nitrogen and gasoline additive MTBE. a type of aerator or air stripper that leaves the body of water, or uses air to enter the oxidation of dissolved oxygen in the body of water to oxidize other substances such as iron, manganese or organic solvents in the water. .

In order to increase the effect of aeration, in addition to increasing the temperature of the water or air, different types of aerators and air strippers can be applied, for example: (1) increasing gas and dissolving in liquid phase The gas saturation concentration difference, (2) increase the ratio of the contact area of the gas to the water body, and (3) increase the contact time between the gas and the water body. The known techniques include: increasing the air water ratio, increasing the height of the air stripping tower, adding different types of packings inside the stripping tower, and adding a fountain aerator ( Jet aerator) The height of the water jet column is either a smaller aperture nozzle or an increase in the turbulence of the water jet column, increasing the depth of the bubble diffuser or using a smaller aeration aperture. However, the above-mentioned conventional technology has a large pressure loss and requires a large air or water column pressure, which means that a blower or a pump that requires more power and consumes more energy, or an excessively high blown tower or the like The impact of the environment caused by the environment. In addition, the composition of the sewage is usually complicated and there are many impurities. The aeration holes, the water spray holes or the filling materials in the blowing tower are easily blocked by sewage impurities, scales or breeding algae under long-term use, resulting in obvious efficiency of aeration. Reducing and increasing the frequency of maintenance, and therefore the need to use the sewage filter device before the blow-off operation, these factors lead to higher operating and maintenance costs.

When the ambient temperature is below the freezing point, the surface of the sewage will also affect the aeration effect of the underwater aeration device. In addition, the maintenance of the conventional underwater aeration device also needs to suspend the sewage treatment process, and the water can be discharged after the water is discharged. The cumbersome and expensive process and the sewage that cannot be maintained during the maintenance period may pollute the surrounding environment.

When the high-intensity ultrasonic sound is placed in a water body, the sound field of the high-voltage radiation at the front end will produce an acoustic cavitation effect, and the acoustic cavitation effect is an environment in which the temperature exceeds several thousand atmospheres, and the thermal effect exceeds 5000 °C. , a jet of more than 1500 m/s, and a highly active OH* radical. In the prior patent of ultrasonic sonication device combining ultrasonic sound cavitation and aeration for ammonia and other volatiles (CN02148455.4, CN200410067671.6, CN200610044991.9, CN201110182864.6, CN02220442.3, CN200420068588.6, CN201120022514. 9,CN200910089078.4, CN201110025931.3, CN02286629.9, CN200820032722.5, CN200920063826.7, CN201020192681.3, CN201020561835.1, CN201020564461.9), only a rough description of the use of the ultrasonic bath or the ultrasonic sound directly The work of inserting downward into the water body does not give any indication of the characteristics of the ultrasonic technology itself.

In the disclosure, when the amplitude of the concave sound electrode exceeds the critical value, the capillary wave on the surface of the water body cast above the concave sound electrode will be broken to generate minute droplets in the air, and the natural flow or forced flow of the air may be matched to achieve aeration and release. effect.

The present disclosure discloses a hollow sonotrode. The recessed sound electrode includes an output end, a neck and an input end. The output end includes an output surface and one or more recesses, and the recess is open to the output surface. The depressions are independent and of any shape, and may be inverted conical, cylindrical or a combination of a cylindrical shape and an inverted conical shape.

The present disclosure provides a depressed sound pole having one or more recesses for atomizing a body of water into small diameter droplets for high speed motion for aeration and stripping.

In addition, the present disclosure also discloses a high speed vibration device. The high-speed vibration device includes a transducer, a booster, a depressed sound pole, and a water column device. The amplifying device connects the transducer and amplifies the amplitude produced by the transducer. The recessed sound electrode includes an output end, a neck portion and an input end, wherein the output end includes an output surface and one or more recesses, and the recess is open to the output surface. The output surface outputs the amplitude to rapidly atomize the water body above the surface of the depressed sound electrode output into a small droplet in the air. When the concave sound pole is working, its working direction is upward, and the water column device is located above the concave sound pole.

In the present disclosure, the output surface of the depressed sound electrode is designed to have a concave shape. This configuration can provide a large working area and can restrict the free flow of the water body, and efficiently the water column water body on the concave sound electrode output surface can be quickly fogged. Form into tiny droplets in the air. The atomized droplets can be quickly volatilized into the air by the natural flow or forced flow of the air, and the volatile substances can be reused through the recycling process or provide oxygen. The tiny droplets containing the high dissolved oxygen in the tiny droplets are returned to the water body such as the sewage pool or the pond, so that the water body contains a high dissolved oxygen ratio, or the specific substance in the tiny droplets is rapidly oxidized and then returned to the sewage pool. Or the mother body such as groundwater.

The disclosure uses the concave sound pole to atomize the water column water into tiny droplets in the air, the gas-water ratio is high, the aeration effect is high, the aeration time is short, and the height of the required stripping tower building can also be reduced. Thus reducing the impact on the environmental landscape. The disclosed method is a secondary pollution caused by a chemical method using a conventional physical method without a conventional ammonia nitrogen abatement technology.

The present disclosure uses a depressed sound pole to atomize a water column into a small droplet in the air. There is no known technique for using a small aperture to be blocked by sewage debris or scale or breeding algae.

The present disclosure does not use any filler, and the blow-off air pressure loss is extremely small, the running cost is low, there is no filler fouling or the pressure loss and the aeration efficiency loss caused by the algae blocking filler.

The disclosure discloses that the use of a larger diameter water column water body can improve efficiency, and has a high tolerance range for sewage impurities, and can use a simple sewage filtering device or a sewage filtering device to save operating costs.

The disclosure uses a larger diameter water column water body, which can be easily adopted to waste treatment technology. For example, when the ammonia nitrogen stripping operation is performed, the pH value of the aqueous ammonia-containing water body must be adjusted to an appropriate alkaline range. The present disclosure can use alkaline coal ash which is regarded as waste as a preparation agent, so that the water body has a high content. Free ammonia is easy to follow off the ammonia nitrogen.

The disclosed high-speed vibration device is designed as a modular type, and can be used alone or in an immediate manner according to the demand of the aeration amount, and the number of the high-speed vibration device disclosed in the present disclosure can be adjusted, and the online maintenance can be performed without suspending the sewage treatment process.

The high-speed vibration device can be placed on the surface of the sewage pool. When the ambient temperature is below the freezing point, the high-speed vibration of the sound electrode can suppress the freezing of the surface of the sewage and maintain a certain aeration effect.

The high-speed vibration device uses a sonotrode to atomize the water column into a small droplet in the air, and can uniformly distribute the minute droplets in the surrounding environment in accordance with the natural flow or forced flow of the air as a humidity increasing device in a large space environment. For example, a plant factory or an atomization pretreatment device that separates and purifies biomass energy (eg, ethanol) from water during production.

The embodiments disclosed herein are incorporated in the drawings to explain the details. In addition, similar component symbols correspond to the same or corresponding component parts.

As shown in the embodiment of FIG. 2, the recessed sonotrode 10 includes an input end 20, a neck 30, and an output end 40. The output 40 includes an output surface 41 and a recess 42. In the embodiment shown in FIG. 2, the recess 42 of the depressed sound pole 10 is a combination of a cylindrical shape and an inverted conical shape, and the dimensions of the recess can be varied according to actual needs to achieve an optimum degree of processing. In the embodiment shown in Fig. 3, the recess 42 of the depressed sound pole 10 is a cylindrical shape. In the embodiment shown in FIG. 4, the recess 42 of the depressed pole 10 is a cylindrical shape, except that the dimension of the neck 30 is the same as the dimension of the output end. In other embodiments (not shown), the scale of the input end 20 The dimensions of the neck 30 and the dimensions of the output 40 can all vary freely due to actual needs. In the embodiment shown in FIG. 5, the recess 42 of the depressed sound pole 10 is composed of a plurality of cylindrical recesses. For other embodiments (not shown), the recesses 42 are independently selected from the inverted conical shape. , cylindrical or a combination of cylindrical and inverted conical.

The diameters of the output ends 40 of the depressed sound poles 10 of FIGS. 2, 3, 4 and 5 can be designed to be between 30 mm and 300 mm according to different requirements, and the depressions in FIGS. 2, 3, 4 and 5 The aperture 42 of the pole 10 has an aperture of between 3 mm and 300 mm as desired.

The vibration frequency output by the concave sound pole 10 can be designed according to different requirements. The vibration frequency design is between 6 kHz and 60 kHz for high frequency and high speed motion, and the water body is rapidly atomized to generate a large number of tiny droplets in the air. in. Theoretically, the higher the vibration frequency of the depressed pole 10, the smaller the scale of the minute droplets. According to the microwave theory of the surface of the water body, the size of the droplet is about tens of micrometers.

The high frequency vibration device 100 shown in FIG. 6 includes a transducer 60, an amplification device 50, a depressed sound pole 10', and a water column device 70. The transducer 60 includes a piezoelectric device 61. The piezoelectric device 61 can convert electrical oscillations into mechanical oscillations. In other embodiments (not shown), the transducer 60 that converts electrical oscillations into mechanical oscillations may be of the magnetostrictive type. As shown in the embodiment of FIG. 6, the amplifying device 50 is a flange structure 51. The flange structure 51 includes an annular plate 52, and a plurality of through holes 53 are disposed in the annular plate 52. The amplifying device 50 is mainly connected to the transducer 60 and the depressed sound pole 10'. The water column device 70 is located above the depressed sound pole 10', primarily to direct the water body above the output end 40' of the recessed sound pole 10'. The peripheral water pipe means for connecting the water column device 70 is a conventional technique, and is not shown in Fig. 6 of the embodiment.

In the embodiment shown in FIG. 6, the output end 40' of the depressed sound pole 10' includes an output surface 41' and a cylindrical recess 42' that outputs the amplitude, and when the recessed sound pole 10' is implemented The direction of work is upward. The technical features of the remaining depressed sound poles 10' are similar to those of the recessed sound poles 10, and will not be described herein. The following description is primarily directed to the combined operation of various high frequency vibration devices 100.

The embodiment 1' shown in FIG. 7 includes a plurality of high frequency vibration devices 100, a tower 81, an air inlet 82 and an exhaust port 83, wherein the arrow is gas. Flow direction. In the embodiment shown in FIG. 7, the plurality of high frequency vibration devices 100 form a planar two-dimensional arrangement inside the tower body 81, but in other embodiments, the plurality of high frequency vibration devices 100 may be formed inside the tower body 81. A three-dimensional arrangement (not shown). In the embodiment shown in FIG. 7, the gas enters the inside of the tower body 81 from the intake port 82, and when the flowing gas passes through the minute droplets atomized by the high-frequency vibration device 100, the flowing gas can be dissolved in the minute liquid. The volatile matter in the droplet is quickly driven out of the water body and taken out to the exhaust port 83, and then the discharged gas can be recycled or reused according to actual needs. In the first embodiment, since no filler is used, the blow-off air pressure loss is extremely small, the running cost is low, there is no filler fouling or the pressure loss and the aeration efficiency loss caused by the algae blocking filler. In addition, the first embodiment of the present invention uses a larger diameter water column water body to improve efficiency, and has a high tolerance range for sewage impurities, and a simple sewage filtering device or a sewage filtering device can be used to save operating costs. This embodiment 1' can be easily adopted to waste the waste technology. For example, when performing ammonia nitrogen stripping operation, the pH of the ammonia-containing water body is adjusted to an appropriate alkaline range using alkaline soot regarded as waste, for example, pH=11, so that the water body contains high free ammonia ( Free ammonia) is easy to blow off ammonia nitrogen.

The embodiment 2 shown in FIG. 8 such that the same sump aerator comprises a plurality of high frequency vibration devices 100, a water body 92 and a horizontal surface 91. In this embodiment, the high frequency vibration device 100 is disposed in The surface of the pool, and the horizontal plane 91 is interposed between the output surface 40 of the high frequency vibration device 100 and the amplification device 50. The water body of the water column device 70 can be from any part of the sewage pool by the pipeline device. The rapid fog is transmitted through the high frequency vibration device 100. The tiny droplets in the air, the air provides oxygen in the tiny droplets and then the tiny droplets containing high dissolved oxygen are returned to the sewage pool, so that the precursor of the sewage pool water contains a higher dissolved oxygen rate. The 100 is designed as a modular type, and the number of installed high-speed vibration devices 100 can be adjusted in time according to the demand of the aeration amount, and the online maintenance can be performed without suspending the sewage treatment process. Further, the high-speed vibration device 100 of the present embodiment is placed. Placed on the surface of the lagoon, when the ambient temperature is below the freezing point, because of the high-speed vibration of the swelled sound, the surface of the sump is inhibited from freezing and the sump is maintained. Aeration effect.

Another application example:

For the increase of humidity in a large space environment such as a plant factory, a simple water filtration device or a water filtration device can be used to atomize a large-scale water column into a small droplet in the air by using the disclosed technology. The natural flow of air or forced flow spreads tiny droplets evenly throughout the environment to increase the humidity of the large space environment.

Another application example:

In the production process of producing biomass energy such as ethanol, it is necessary to separate the ethanol and water to purify the ethanol raw energy. Traditionally, the difference between the boiling point of ethanol and water is utilized to purify by using a heating method with a large energy consumption, and the present disclosure technology is utilized. It can be used as a pretreatment technology for purification of biomass energy such as ethanol to save energy.

Another application example:

For groundwater containing manganese or iron, the groundwater can be rapidly atomized into tiny droplets in the air by using the disclosed technology, and specific substances such as manganese or iron in the fine droplets can be rapidly oxidized and then returned to the mother body such as groundwater for purification. groundwater.

The technical content and technical features of the present disclosure have been disclosed as above, but those skilled in the art should understand that the teachings and disclosures of the present disclosure are disclosed without departing from the spirit and scope of the disclosure as defined by the appended claims. Can be used for various substitutions and modifications. For example, many of the devices or structures disclosed above may be implemented in different ways or substituted with other structures, or a combination of the two.

Moreover, the scope of the present invention is not limited to the particular embodiments of the process, machine, manufacture, compositions, means, methods or steps of the particular embodiments disclosed. It should be understood by those of ordinary skill in the art that, based on the teachings of the present disclosure, the components, devices, methods, or steps of the process, the machine, the manufacture, the substance, whether present or future developers, and embodiments thereof The revealer performs substantially the same function in substantially the same manner, and achieves substantially the same result, and can also be used in the present disclosure. Accordingly, the scope of the following claims is intended to cover such compositions, devices, manufactures, compositions, methods, methods or steps.

1',1"...system

10,10'. . . Concave sound pole

20,20'. . . Input

30,30'. . . neck

40,40'. . . Output

41,41'. . . Output surface

42,42'. . . Depression

50. . . Amplifier

51. . . Flange structure

52. . . Ring plate

53. . . Through hole

60. . . Transducer

61. . . Piezoelectric device

70. . . Water column device

81. . . Tower body

82. . . Air inlet

83. . . exhaust vent

91. . . level

92. . . Water body

100. . . High frequency vibration device

Figure 1 shows a schematic view of a conventional ultrasonic sonotrode;

2 shows a schematic view of a depressed sound pole having a combined recess of a cylindrical shape and an inverted conical shape according to an embodiment of the present disclosure;

3 shows a schematic view of a depressed sound pole having a cylindrical recess according to an embodiment of the present disclosure;

4 shows a schematic view of a depressed sound pole having a cylindrical recess according to another embodiment of the present disclosure;

FIG. 5 is a schematic view showing a depressed sound pole having a plurality of cylindrical depressions according to an embodiment of the present disclosure; FIG.

6 shows a schematic diagram of a high frequency vibration device according to an embodiment of the present disclosure;

FIG. 7 shows a schematic diagram of a system composed of a plurality of high frequency vibration devices according to an embodiment of the present disclosure;

FIG. 8 shows a schematic diagram of a system consisting of a plurality of high frequency vibration devices in accordance with another embodiment of the present disclosure.

10. . . Concave sound pole

20. . . Input

30. . . neck

40. . . Output

41. . . Output surface

42. . . Depression

Claims (11)

A recessed sound pole, comprising: an output end comprising an output surface and a plurality of recesses, wherein the recess is located on the output surface; a neck connecting the input end and the output end; and an input end connecting The neck. The depressed sound pole according to claim 1, wherein the recesses are independently selected from the group consisting of an inverted conical shape, a cylindrical shape, a combination of a cylindrical shape and an inverted conical shape, and the like. The depressed sound pole according to claim 1, wherein the output end has a diameter of between 30 mm and 300 mm. The depressed sound poles according to claim 1, wherein the recesses have a diameter of between 3 mm and 300 mm. The depressed sound pole according to claim 1, characterized in that the output frequency of the output terminal is between 6 kHz and 60 kHz. A high frequency vibration device, comprising: a transducer comprising a piezoelectric device; an amplification device connecting the transducer and amplifying an amplitude generated by the piezoelectric device; a depressed sound pole, The method comprises: an output end comprising an output surface and one or more recesses, wherein the recess is located on the output surface, the output end outputs the amplitude; a neck connecting the output end and the input end; and an input end connecting the a neck; and a water column device that directs the body of water above the output surface of the depressed sound pole. The depressed sound pole according to claim 6, wherein the recesses are independently selected from the group consisting of an inverted conical shape, a cylindrical shape, or a combination of a cylindrical shape and an inverted conical shape. The depressed sound pole according to claim 6, wherein the output end has a diameter of between 30 mm and 300 mm. The depressed sound pole according to claim 6, wherein the recesses have a diameter of between 3 mm and 300 mm. The depressed sound pole according to claim 6, characterized in that the output frequency of the output terminal is between 6 kHz and 60 kHz. The depressed sound pole according to claim 6, wherein the output end is in an upward direction.