KR20020053699A - A swage treatment device in using ultrasonic wave - Google Patents

Abstract

PURPOSE: A sewage treatment device using ultrasonic wave which can purify sewage by performing precipitation, flocculation, foam control, coagulation and dispersion using the property of ultrasonic wave such as acoustic radiation pressure, straight jet, standing wave and directivity is provided to reduce the time of purification without the dosage of additives. CONSTITUTION: The device comprises an ultrasonic wave creation part(4) which is composed of a constant voltage creator(1), an electric power controller(2), a timer(5) and an ultrasonic wave creator, an ultrasonic wave oscillators(6a,6b,6c,6d) which transmit ultrasonic wave into sewage through transducer and horns, a sewage drainage pipe(13) and a gas emission pipe(17) at the upper part of the device, a sewage treatment tank(10) which has big sediment discharge pipe(14) and valve(15) that discharge sediment into sediment compression tank(30), sewage stabilization tanks(20a,20b,20c,20d) installed in series of which each tank has a gas emission pipe at the upper part and has a small sediment discharge pipe(21) and valves(22a,22b,22c,22d) at the lower part, a piston(32), a sewage return pipe(33) and an inlet of solid(34) which is contained in the sediment discharge pipe, a water quality inspection tank(40).

Description

Sewage treatment device in using ultrasonic wave

The present invention applies the principle of the characteristic factor of the ultrasonic energy provided by "Applicant's patent application No. 110354" Ultrasonic atomizer of liquid fuel "to the sewage purification treatment field. Briefly described as follows.

Acoustic radiation pressure is a phenomenon in which when the intensity of sound exceeds a certain threshold (large amplitude), the medium itself moves (vibrates) at the same time as ultrasonic vibration, and it is used for sewage treatment. Dispersion, sedimentation, sedimentation, foam suppression, coagulation, polymerization and the like easily occur.

Negative straight flow is a flow of liquid that advances when ultrasonic vibrations occur, which causes various reactions such as dispersion, precipitation, polymerization, and agglomeration. This is facilitated.

Standing waves (standing waves, or standing waves) are sound waves in which the incident wave and the reflected wave do not progress when the plane sound wave is incident at right angles to the boundary of the wide plane wall as shown in FIG. 2. When resonance occurs, the amplitude is maximum, and when the amplitude is 0, the pressure is maximum. This action causes the foreign substances in the area where the ultrasonic wave is strongly applied to drop off and disperse. ), Fluctuations, and so on.

The directivity of ultrasonic waves is a property in which sound is radiated strongly in a certain direction according to the height of the frequency. The sound having a large frequency and high is concentrated only in the front direction of the vibration surface, and the sound having a low frequency and low frequency. Radiates not only in the front but also in the transverse direction. The higher the frequency, the sharper the directivity, and when the size of the sound source is different, as shown in Fig. 3, the larger the ratio between the diameter D and the wavelength λ , the sharper the directivity appears. At this time, the cohesion and polymerization of foreign matters Sedimentation is accelerated.

Ultrasonic cavitation refers to the collection of air molecules (cavitation nuclei, bubble nuclei) that are dissolved in a liquid by applying ultrasonic waves that can give a very large acceleration to media particles. It refers to a phenomenon ranging from agglomeration, growth, and development to collapse.

Liquids are somewhat different depending on their type, temperature, and pressure, but because they are gaseous, the ultrasonic wave grows a cavity or air bubble of a size proportional to the size of an atom or molecule, and the minimum starting point Seeds of are called cavitation nuclei (bubble nuclei). In the cavitation burst as shown in FIG. 4A, in the case of a point or a spherical sound source, as the medium is repeatedly expanded and compressed by ultrasonic waves, a small density wave is generated. When this is represented by the relationship between the sound pressure P and the time t as shown in Fig. 4B, the increase or decrease of the sound pressure occurs around the static pressure P ₀ (usually 1 atm).

4A illustrates a case where the output of the ultrasonic waves (sound pressure amplitude, sound pressure) is small, and the magnitude difference between the overpressure and the negative pressure is small, but FIG. 4B shows the output. In this large case, the magnitude difference between the overpressure and the negative pressure is very large. According to the magnitude of this negative pressure, the liquid is attracted, and as the bubble nucleus and liquid air molecules in the liquid collect or grow, the cavity becomes a state of two. Since the bubble is further developed and maximized at 3, it is gradually compressed and then adiabatic compression (temporary phenomenon) in the state of co-disintegration or small cavity at 4, which is approximate insulation. As shown in Fig. 5, it becomes a microbubble of high temperature and high pressure, is broken at 6, and is finely divided into a molecular form.

When the breakdown occurs, the bubble generates a shock wave of high temperature of several hundred degrees Celsius and several tens of kilograms per square centimeter, which causes intense noise in the liquid, colliding and coalescing or destroying the liquid. Acoustic radiation pressure or rectilinear flow is applied, and the liquid level develops and rises upward, causing abduction, and sharp atomization of natural frequency occurs. This cleavage process is shown in Fig. 4C. Also, as shown in (D) of FIG. 4, the droplet a which is broken up as a slightly larger intermediate particle at the liquid level is subjected to microspray as in c → d → e by the destruction b of the cavitation bubble therein. Sometimes it is repartitioned.

On the other hand, the cavitation effect of ultrasonic waves is particularly effective in the application of high-intensity ultrasonics, such as coagulation, spraying, cleaning, diffusion rate and reaction rate, or high molecular weight. It has been used advantageously for nuclear polymerization of liquor, aging of liquor, medical treatment and surgery.

The present invention relates to a sewage treatment apparatus using the characteristic factor of the ultrasonic energy, and more specifically, to the foreign matter in the sewage using the characteristic factor of the ultrasonic energy transmitted from a plurality of ultrasonic oscillators mounted radially around the sewage treatment tank. It is possible to purify the sewage in a short time without administration of additives by dispersing, sedimentation, sedimentation, foam suppression, coagulation and polymerization. It is possible to provide a sewage treatment apparatus.

In order to purify sewage discharged from various industrial facilities and general households, physical treatment methods, chemical treatment methods, and microbial treatment methods have been mainly used. However, these treatment methods not only take a long time to purify, but also cause serious problems in the water environment, such as various additives administered to flocculate or decompose the suspended matter, rather forming a second pollutant.

The present invention is to solve the problems as described above, by using the principle of the present invention, patent application No. 110354 "Ultrasonic atomizer of liquid fuel" using the principle of the ultrasonic energy, radial pressure, direct current Ultrasonic cavitation by maximizing ultrasonic wave, standing wave, directivity, etc. to maximize the precipitation, flocculation, foam control, flocculation of foreign substances in various sewage It is an object of the present invention to provide a sewage treatment apparatus capable of purifying sewage in a short time without administering an additive by promoting agglutination and dispersion.

In order to achieve the above object, the present invention provides an ultrasonic generator comprising a constant voltage generator, a power input controller, a timer, and an ultrasonic generator, an ultrasonic oscillator configured by an ultrasonic vibrator and an ultrasonic horn, and filthy water in which a plurality of the ultrasonic oscillators are radially disposed. Treatment tank, sewage stabilization tank of multiple stages connected in series to settle fine foreign matter, sewage treatment tank and sediment compression tank for compressing and dehydrating the sediment discharged from the sewage treatment tank and water treatment tank characterized in that it consists of.

1 is a schematic view showing the components of the sewage treatment apparatus according to the present invention

2 is a model showing the amplitude and pressure distribution of standing waves by reflected waves

3 is a model showing the change in directivity according to the diameter (D) of the sound source and the wavelength of the sound wave ( λ )

4 is a model showing the ultrasonic cavitation cleavage

5 is a flowchart showing the operating principle of the ultrasonic wave generator / oscillator.

6 is a cross-sectional view of the sewage treatment tank.

7 is a longitudinal sectional view of the sewage treatment tank;

8 is a cross-sectional view of the sediment compression tank

9 is a state of use of the precipitate compression tank

10 is a cross-sectional view of the sewage stabilizer

11 is a cross-sectional view of the water quality inspection tank

<Description of Major Symbols in Drawing>

1: constant voltage regulator 2: power input regulator

3: ultrasonic generator 4: ultrasonic generator

5: Timer 6a, 6b, 6c, 6d: Ultrasonic Oscillator

7: ultrasonic vibrator 8a, 8b, 8c, 8d: ultrasonic horn

10: sewage treatment tank 11a, 11b: turning induction suction pipe

12: sewage suction pump 13: sewage discharge pipe

14: sediment discharge pipe (large) 15: sediment discharge valve (large)

16 inspection glass 17 gas exhaust pipe

18: gas exhaust pump

20a, 20b, 20c, 20d: sewage stabilizer 21: sediment discharge pipe (small)

22a, 22b, 22c, 22d: sediment discharge valve (small)

30 sediment compression tank 31 back pressure plate

32: piston 33: sewage return pipe

34: solid discharge port 35a, 35b: stop jaw

36: transfer means

40: water quality inspection tank 41: inspection port

42: sewage discharge valve 43: sewage discharge pipe

Hereinafter, a sewage treatment apparatus using ultrasonic waves according to the present invention will be described in detail with the accompanying drawings.

The sewage treatment apparatus using ultrasonic waves includes an ultrasonic generator 4 and an ultrasonic vibrator 7 including a constant voltage generator 1, a power input controller 2, a timer 5, and an ultrasonic generator 3 as shown in FIG. Ultrasonic oscillation parts 6a, 6b, 6c, 6d composed of ultrasonic horns 8a, 8b, 8c, and 8d, and the ultrasonic oscillation parts 6a, 6b, 6c, and 6d on top are radial. Sewage treatment tank 10 arranged in multiple, sewage stabilization tank 20a (20b) (20c) (20d) of the multi-stage connected in series to precipitate fine foreign matter, sewage treatment tank 10 and sewage treatment tank (20a) It consists of a sediment compression tank (30) and a water quality inspection tank (40) for compressing and dewatering the precipitate discharged from the (20b) (20c) (20d) to treat it as a solid.

The ultrasonic generator 4 has a separate facility outside the sewage treatment tank 10 as shown in FIG. 1, and adjusts the intensity of the constant voltage generator 1 and the ultrasonic wave to maintain a constant voltage necessary for generating ultrasonic waves at all times. In addition to the power input controller (2) for the timer 5 for adjusting the irradiation time, as shown in Figure 5 is composed of an ultrasonic generator (3) having a vibrating portion, an amplifying portion and a frequency adjusting portion.

Ultrasonic oscillators 6a, 6b, 6c, 6d are arranged radially around the sewage treatment tank 10, as shown in FIG. 6, and have an ultrasonic transducer 7 and an ultrasonic horn 8a. Ultrasonic energy is output into the wastewater through (8b) (8c) and (8d).

The ultrasonic oscillation unit 6a, 6b, 6c, 6d is arranged radially on the top of the sewage treatment tank 10, and to exhaust the gas generated during the purification process as shown in FIG. There is a gas exhaust pipe 17 and a wastewater discharge pipe 13 for discharging the primary treated water purified by ultrasonic waves. In the lower part of the sewage treatment tank 10, a plurality of turning induction suction pipes connected in a tangential direction to the circular sewage treatment tank 10 to form a swirl flow in the sewage treatment tank 10 as shown in FIG. 7. (11a) (11b), sediment discharge pipe (large) 14 and sediment discharge valve (large) 15 for discharging sediment into the sediment compression tank 30, and inspection glass for observing the state of sediment ( 16) is installed.

The sewage stabilization tanks 20a, 20b, 20c, and 20d are connected in series as shown in FIG. 1 to precipitate finer foreign matter in the primary treatment water purified by ultrasonic waves in the sewage treatment tank 10. 10, the gas exhaust pipe 17 for exhausting the gas generated during the purification process is located above the sewage stabilization tanks 20a, 20b, 20c, and 20d, and the sediment compression tank is located below. A sediment discharge pipe (small) 21 and a sediment discharge valve (small) 22a, 22b, 22c and 22d for discharging to 30 are provided.

The sediment compression tank 30 is a sediment discharge pipe (large) 11 into which the sediment treated in the sewage treatment tank 10 and the sewage stabilization tanks 20a, 20b, 20c, and 20d flows, respectively, as shown in FIG. ) And a sediment discharge pipe (small) 21 are located at the upper portion, and a piston 32 for compressing and dewatering the sediment is installed at the front, and a back pressure plate 31 for preventing the retreat and outflow of the sediment. It is configured to move back and forth by other means such as screw transfer. On the other hand, a sewage conveying pipe 33 and a solid discharge port 34 for sending the sewage discharged after the compression and dehydration treatment of the sediment back to the sewage treatment tank 10 are formed, and the sediment in front of the solid discharge port 34. A stopper 35a, 35b for supporting the back pressure plate 31 at the time of compression and dehydration is provided.

The water quality inspection tank collects the treated water treated in the sewage treatment tank 10 and the multi-stage sewage stabilization tanks 20a, 20b, 20c, and 20d as shown in FIG. 11 so that the degree of purification of the treated water can be visually confirmed. The inspection port 41, the sewage discharge valve 42, and the sewage discharge pipe 43 are formed.

Hereinafter, a process of treating sewage through the sewage treatment apparatus will be described in detail.

When the wastewater containing foreign matters flows into the sewage treatment tank 10 through a plurality of turning induction suction pipes 11a and 11b formed in a tangential direction with respect to the circular sewage treatment tank 10, ultrasonic energy is transferred to the foreign matter in the wastewater. The inside of the sewage treatment tank 10 to be evenly penetrated, and at this time, the user operates the power input controller 2 and the timer 5 in consideration of the kind, specific gravity, and viscosity of the foreign matter contained in the sewage. The intensity and irradiation time required for the purification process will be determined.

When ultrasonic waves are radiated from the ultrasonic oscillation units 6a, 6b, 6c, and 6d radially mounted around the sewage treatment tank 10, ultrasonic energy penetrates the foreign matter contained in the sewage and ultrasonic cavity As it promotes reactions such as aggregation, polymerization, repolymerization, and foam suppression, foreign substances precipitate. The precipitated foreign matter is discharged to the sediment compression tank 30 through the sediment discharge pipe (large) 14, and the primary treated water purified by the ultrasonic wave is a series of sewage stabilizers 20a, 20b and 20c connected in series. (20d), where the fine suspended matter precipitated in the sewage stabilization tank (20a) (20b) (20c) (20d) sediment discharge pipe formed in the sewage stabilization tank (20a) (20b) (20c) (20d) It is discharged to the sediment compression tank 30 through the (small) 21. The final stage sewage stabilization tanks 20a, 20b, 20c, and 20d have undergone the final purification treatment, after the final inspection visually through the inspection port 41 in the water quality inspection tank 40. 43, the gas generated during the sewage treatment in the sewage treatment tank 10 and the sewage stabilization tanks 20a, 20b, 20c, and 20d is exhausted through the gas exhaust pipe 17.

Meanwhile, the sediment discharged from the sewage treatment tank 10 and the sewage stabilization tanks 20a, 20b, 20c, and 20d flows into the sediment compression tank 30 and is located in front of the solid discharge port 34. When stacked between the piston and the piston 32, the back pressure plate 31 is moved to the front of the solid outlet 34 as shown in FIG. 9 and the stoppers 35a and 35b are inserted to prevent the back pressure plate 31 from retreating. After that, the piston 32 having a stroke distance to the front of the solid discharge port 34 is operated to compress and dehydrate the precipitate. At this time, the water contained in the foreign matter is introduced again into the sewage treatment tank 10 through the sewage conveying pipe 33, and the compressed and dehydrated solids are removed after the stop jaw 35a and 35b are removed. When it is conveyed to the rear of the solid discharge port 34 and the piston 32 is reactivated, the solid discharge port 34 is discharged through the solid discharge port 34 and loaded on the transfer means 36.

The sewage treatment apparatus using ultrasonic waves produced by the present invention described above, by controlling the intensity and irradiation time of the ultrasonic energy according to the conditions of the foreign substances without using the additives necessary for decomposition and aggregation of the foreign substances to remove the foreign substances contained in the sewage Because of the flocculation, polymerization and precipitation to purify, the purification time is shortened without generating secondary pollutants, and the method of use is also simple. Therefore, it can be widely used for the purification of various industrial wastewater, agricultural and livestock wastewater, and contaminated seawater.

Claims (1)

An ultrasonic generator (4) comprising a constant voltage generator (1), a power input controller (2), a timer (5), an ultrasonic generator (30) having a vibrator, an amplifier, and a frequency controller; Ultrasonic oscillator 6a for outputting the ultrasonic energy generated by the ultrasonic generator 4 into the sewage through an ultrasonic transducer 7 and ultrasonic horns 8a, 8b, 8c and 8d. 6b) 6c) 6d; The ultrasonic oscillation parts 6a, 6b, 6c, 6d, a wastewater discharge pipe 13, and a gas exhaust pipe 17 are disposed in the radially upper part, and the sewage treatment tank introduced at the lower part thereof. (10) a sediment discharge pipe (large) 14 for discharging a plurality of swirl induction suction pipes 11a and 11b connected in a tangential direction to form a swirl flow therein and a precipitate to the sediment compression tank 30; A sewage treatment tank 10 in which a sediment discharge valve (large) 15 is provided; The gas exhaust pipe 17 is located at the upper part, and the sediment discharge pipe (small) 21 and the sediment discharge valve (small) 22a, 22b, 22c, and 22d are installed in the lower part of the series. Baths 20a, 20b, 20c and 20d; Sediment discharge pipe (large) 14 and sediment discharge pipe (small) 21 into which the sediment treated in the sewage treatment tank 10 and sewage stabilization tanks 20a, 20b, 20c, and 20d respectively flows in. Piston 32 having a stroke distance to the solid discharge port 34, the back pressure plate 31 that can be moved back and forth to prevent the retreat and outflow of sediment, and prevents the back pressure of the back pressure plate 31 during compression and dehydration A sediment compression tank 30 in which stop jaws 35a and 35b, a waste water conveying pipe 33, and a solid discharge port 34 are formed; The water quality inspection tank 40 in which the inspection port 41 is formed so that the purification degree of the treated water purified by the sewage treatment tank 10 and the sewage stabilization tank 20a, 20b, 20c, and 20d can be visually checked. Sewage treatment apparatus using ultrasonic waves, characterized in that consisting of.