KR102105197B1 - sludge treatment apparatus using ultrasonic wave - Google Patents

Abstract

An apparatus for treating sludge using ultrasonic waves according to the present invention includes: a body connected to a sludge storage tank to be provided with sludge introduced therein, a body installed higher than the sludge storage tank by a support frame; It is rotatably provided inside the body to allow the sludge inside the body to stir or stop stirring, so that different dual-frequency ultrasonic waves are transmitted to the sludge inside the body so as to cross each other inside the body. A dual frequency ultrasonic stirring unit that solubilizes the sludge with ultrasonic vibration of a dual frequency cross-irradiated with each other; A stirring drive unit connected to the dual frequency ultrasonic stirring unit to provide a rotation driving force for rotating the dual frequency ultrasonic stirring unit; And a stirring electric motor provided between the dual frequency ultrasonic stirring unit and the stirring driving unit and having a central frame to transmit rotational driving force provided by the stirring driving unit to the dual frequency ultrasonic stirring unit. .
Accordingly, the hydraulic residence time in the anaerobic digestion process in which energy consumption is reduced can be shortened, the digestion efficiency can be improved, and a sludge treatment apparatus using ultrasonic waves capable of minimizing sludge waste can be provided. .

Description

{Sludge treatment apparatus using ultrasonic wave}

The present invention relates to a sludge treatment device using ultrasonic waves, and more particularly, to a sludge treatment device using ultrasonic waves to solubilize organic wastes such as food waste and sewage sludge for aerobic or anaerobic digestion processes.

In general, organic wastes such as sewage sludge, livestock manure, food waste and organic municipal solid waste contain high concentration pollutants and are regarded as the main pollutants of water quality. , It has been treated by methods such as ocean dumping, and in recent years the ocean dumping method has been used as the most representative treatment method.

However, due to the lack of landfill sites and the possibility of inflow of water into secondary pollutants, negative awareness of landfilling of organic waste is prevalent, and aerobic dumping methods have been banned since 2012 in accordance with the London Convention. It is being processed by an anaerobic digestion process. In the activated sludge process, biodegradable organic matter is converted into inorganic carbon dioxide and removed, but some of them are converted into surplus microorganisms by microbial growth and accumulate in the form of sludge.

Among the activated sludge methods, the aerobic process, which is a biological treatment method, that is, the bio-oxidation method, composting, fertilization, and foddering, consumes a lot of energy, and the final by-product composting, manure, is difficult to secure a sales place, and it is limited to excessive use of energy for feed There were some problems.

An example of such a sludge treatment apparatus according to the prior art is disclosed in Korean Patent Registration No. 0165169 (registered on September 16, 1998, hereinafter referred to as 'Patent Document 1').

In order to solve the problem of the sludge treatment method by the activated sludge method according to the prior art, a sludge treatment device using an anaerobic digestion process is used, but in relation to the treatment and disposal of the sludge, the excess sludge does not rapidly generate anaerobic digestion, so 20 days There is a problem in which hydraulic retention time (HRT) is required, and there is a problem that dehydration is not easy after the anaerobic digestion of the sludge, and such a problem is because most of the sludge is composed of a mass of organic microorganisms. It is when the intracellular transport of organic substances into the anaerobic digestive matrix is blocked by the cell wall of. That is, due to the cell wall, which is a rigid structure surrounding the cell, the cytoplasm made of a large amount of organic material is not used for anaerobic digestion, and thus exhibits low digestive efficiency when anaerobic digestion of sludge.

Republic of Korea Patent Registration No. 0165169 (Registered on September 16, 1998)

An object of the present invention is to provide a sludge treatment apparatus using ultrasonic waves that can shorten hydraulic residence time in an anaerobic digestion process in which energy consumption is reduced, improve digestion efficiency, and minimize sludge waste. Is to do.

In addition, it is to provide a sludge treatment apparatus using ultrasonic waves capable of effectively pulverizing sewage sludge through such dual-frequency ultrasonic vibration, in which dual-frequency ultrasonic vibration is actually applied without problems during the ultrasonic pre-treatment process.

 In addition, it is to provide a sludge treatment apparatus using ultrasonic waves that can increase the production of high-quality biogas through a medium-temperature anaerobic digester and improve the performance of the digester.

In order to achieve the above object, a sludge treatment apparatus using ultrasonic waves according to the present invention includes: a body connected to a sludge storage tank to be provided with sludge flowing therein, a body installed higher than the sludge storage tank by a support frame; It is rotatably provided inside the body to allow the sludge inside the body to stir or stop stirring, so that different dual-frequency ultrasonic waves are transmitted to the sludge inside the body so as to cross each other inside the body. A dual frequency ultrasonic stirring unit that solubilizes the sludge with ultrasonic vibration of a dual frequency cross-irradiated with each other; A stirring drive unit connected to the dual frequency ultrasonic stirring unit to provide a rotation driving force for rotating the dual frequency ultrasonic stirring unit; And a stirring electric motor provided between the dual frequency ultrasonic stirring unit and the stirring driving unit and having a central frame to transmit rotational driving force provided by the stirring driving unit to the dual frequency ultrasonic stirring unit. .

Here, the dual-frequency ultrasonic stirring unit, a pair of first vibration cassettes provided to be oriented mutually with the center frame interposed therebetween, and provided with respect to the first vibration cassette based on the center frame, the center A pair of second vibration cassettes provided to be mutually oriented with a frame interposed therebetween, and a plurality of first ultrasonic oscillators installed on the front surface of the first vibration cassette to generate ultrasonic frequency vibrations of 25 to 30 kHz, and the agent 2 It is preferable to include a plurality of second ultrasonic vibrators installed on the front surface of the vibration cassette to generate ultrasonic frequency vibrations of 35 to 45 kHz.

The stirring motor includes two pairs of cassette wiring stir frames arranged so that the other pair is crossed with each other so as to be connected to the upper and the center frames of each of the first vibration cassette and the second vibration cassette, and the cassette wiring It is preferable that the wires connected to the first ultrasonic vibrator and the second ultrasonic vibrator are wired so as to be sealed from the inside of the stirring frame.

The apparatus for treating sludge using ultrasonic waves according to the present invention further includes an ultrasonic vibrating unit connected to the first ultrasonic vibrator and the second ultrasonic vibrator of the dual frequency ultrasonic stirring unit by the electric wire to control the vibration frequency and output of ultrasonic waves. It is desirable to do.

In addition, the vibration output of the dual frequency ultrasonic stirring unit is preferably 9400 ~ 9800 W.

According to the present invention, it is possible to shorten the hydraulic residence time in the anaerobic digestion process in which energy consumption is reduced, to improve the digestion efficiency, and to provide a sludge treatment apparatus using ultrasonic waves capable of minimizing sludge waste. You can.

In addition, by mutually irradiating dual-frequency ultrasonic waves, a dual-frequency ultrasonic vibration is actually applied without problems during the ultrasonic pre-treatment process, and a sludge treatment device using ultrasonic waves capable of effectively differentiating sewage sludge through such dual-frequency ultrasonic vibrations is provided. can do.

In addition, it is possible to provide a sludge treatment apparatus using ultrasonic waves that can increase the production of high-quality biogas through a medium-temperature anaerobic digester and improve the performance of the digester.

1 is an overall appearance of a sludge treatment apparatus using ultrasonic waves according to the present invention,
Figure 2 is a side view of the internal configuration of the sludge treatment apparatus using ultrasonic waves in Figure 1,
3 is a plan view of the internal configuration of the sludge treatment apparatus using ultrasonic waves of FIG. 1, viewed from above;
4 is a plan view of the sludge treatment apparatus using ultrasonic waves of FIG. 3,
Figure 5 is a graph showing the change in the soluble chemical oxygen demand (SCOD) according to the ultrasonic and irradiation density of the dual frequency by the sludge treatment apparatus using ultrasonic waves according to the present invention,
6 is a plan view of the internal configuration of the sludge treatment apparatus using ultrasonic waves according to another embodiment of the present invention, as viewed from above,
7 is a plan view of the internal configuration of the sludge treatment apparatus using ultrasonic waves according to another embodiment of the present invention, as viewed from above,
8 is a side configuration view of an internal configuration of a sludge treatment apparatus using ultrasonic waves according to another embodiment of the present invention, as viewed from the side;
9 is a control block diagram of the sludge processing apparatus using ultrasonic waves of FIG. 8.

In the present invention, organic wastes such as sewage sludge, livestock manure, food waste and organic municipal solid waste, that is, when treating sludge (hereinafter referred to as 'sludge'), microorganisms constituting the sludge are biodegradable because they are surrounded by a solid cell wall. Sludge treatment system considering the characteristics of these sludges due to its low properties, high content of bound water, such as intracellular water or interstitial water, and high hydrophilicity, making it difficult to separate dewatering or solid-liquid. It relates to a sludge treatment apparatus using ultrasonic waves used in the pre-treatment process configured at the tip of the.

In connection with the above, the purpose of the sludge pretreatment is to increase the biodegradability of the sludge by destroying the cell wall to promote the hydrolysis of the cell constituent materials. That is, the sludge treatment apparatus using the ultrasonic wave of the present invention, that is, the ultrasonic treatment tank (hereinafter referred to as 'ultrasonic treatment tank') has an advantage of not generating harmful substances in the environment during the treatment process, and changes in the capacity of the ultrasonic treatment tank According to the characteristics of the ultrasonic treatment tank, it is easy to elastically add and change the ultrasonic vibrator according to the characteristics of the ultrasonic treatment tank. The ultrasonic vibrator is installed inside the ultrasonic treatment tank, so there is less noise, and the ultrasonic vibrator is agitated and rotated by sludge. Since it is guided around, it has the advantage of efficiently irradiating ultrasonic waves onto the sludge.

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

The sludge treatment apparatus using ultrasonic waves according to the present invention is connected to the sludge storage tank 1 and is provided so that the sludge 10 flows into the sludge by a support frame 3 as shown in FIGS. 1 to 3. The body 100 installed higher than the storage tank 1 and the inside of the body 100 are rotatably provided so that the sludge 10 inside the body 100 is agitated or agitated to stop, and different dual-frequency ultrasonic waves are applied to the body ( A dual-frequency ultrasonic stirring unit that allows the sludge 10 inside the body 100 to be mutually irradiated with dual-frequency ultrasonic vibrations cross-irradiated to be transferred to the sludge 10 inside the body 100 so as to cross each other inside. (200), a dual frequency ultrasonic stirring unit (200) is connected to the stirring unit 300 to provide a rotational driving force for rotating the dual frequency ultrasonic stirring unit (200), and the dual frequency ultrasonic stirring unit (200) And a stirring transmission unit 400 provided between the stirring driving units 300 and having a center frame 410 to transmit rotational driving force provided by the stirring driving unit 300 to the dual frequency ultrasonic stirring unit 200.

Accordingly, in the anaerobic digestion process in which energy consumption is reduced, hydraulic residence time can be shortened, digestion efficiency can be improved, and sludge waste can be minimized.

The body 100, as shown in Figures 1 and 2, is provided to be connected to the sludge storage tank 1 so that the sludge 10 flows from the sludge storage tank 1 and is filled therein, the sludge 10 The inlet pipe 110 and the outlet pipe 120 for discharging solubilized concentrated sludge and the recovery pipe 130 for recovering the sludge 10 to the sludge storage tank 1 when the sludge 10 exceeds the maximum level It is configured to include, the inlet pipe 110 and the recovery pipe 130 is connected to the sludge storage tank 1, the discharge pipe 120 is connected to a digester (not shown), the sludge 10 is moved.

At this time, the body 100 is located at a certain height by the support frame 3, the discharge pipe 120 is installed at the bottom of the body 100, the concentrated concentrated sludge is naturally discharged or recovered to the sludge storage tank (1) To be able to.

As shown in Figure 2, the inside of the portion to which the inlet pipe 110 of the body 100 according to the present invention is connected is formed by bending in the shape of an 'A' sludge 10 flowing through the inlet pipe 110 It is preferable that the inlet guide bracket 111 is installed to prevent contamination by being splashed to other parts when it is introduced into the body 100.

In addition, as shown in Figures 1 and 2, the recovery tube 130 is efficiently ultrasonic by the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221 to be described later of the dual-frequency ultrasonic stirring unit 200 It is installed at a height capable of irradiating the recovery pipe (when the sludge 10 flows in or the sludge 10 expands above the maximum water level determined by the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221 130) the sludge 10 is moved back to the sludge storage tank 1.

In addition, the body 100 of the present invention, as shown in Figure 4, is configured to further include a cover 140 that can be opened and closed on the upper portion of the ultrasonic treatment tank, that is used for maintenance of the interior of the body 100 do. In addition, as shown in FIG. 2, a drain valve 150 is provided on the lower outer side of the body 100 to allow the sludge 10 to be discharged to the outside during maintenance inside the body 100.

On the other hand, as shown in Figure 1, the sludge storage tank 1 is provided with a sludge supply pump 2 so that the sludge 10 stored therein can be supplied through the inlet pipe 110 to the body 100, As shown in Figure 2, the body 100 has a water level of the sludge 10 flowing into the interior exceeds the maximum level or the water level of the sludge 10 expanded inside the body 100 exceeds the maximum level The maximum water level sensor 160 is provided to detect whether or not the sludge 10 is judged to be described later as the water level of the sludge 10 has exceeded the maximum water level through the maximum water level sensor 160. 10) is controlled to be sent back to the sludge storage tank 1 through the recovery pipe 130.

The digester to which the discharge pipe 120 of the body 100 according to the present invention is connected is preferably a medium temperature anaerobic digester.

On the other hand, as shown in Figure 2, the cover 140 of the body 100 includes a plurality of brackets to support the stirring control unit 300 and the stirring control unit 401 to be described later of the stirring transmission unit 400 It is preferable that the installation support 145 to be provided.

2 and 3, the dual frequency ultrasonic stirring unit 200 is spaced from the center frame 410 with the center frame 410 therebetween, and a pair of first vibration cassettes provided to be oriented mutually. A pair of 210 provided to be crossed with respect to the first vibration cassette 210 based on the center frame 410 and spaced apart from the center frame 410 with the center frame 410 interposed therebetween, and provided with mutual orientation. The second vibration cassette 220, a plurality of first ultrasonic vibrators 211 installed on the front surface of the first vibration cassette 210 to generate ultrasonic frequency vibration of 25 ~ 30 kHz, and the second vibration cassette (220) It includes a plurality of second ultrasonic vibrator 221 is installed on the front surface to generate ultrasonic frequency vibration of 35 ~ 45 kHz.

Accordingly, the dual frequency ultrasonic waves are mutually irradiated to solve a number of problems (no structurally specific cases) that occur when the dual frequency ultrasonic vibration is applied to an actual sludge treatment device during the ultrasonic pretreatment process. It is possible to provide a sludge treatment apparatus using ultrasonic waves that can be applied without problems and more effectively pulverize sewage sludge through such dual-frequency ultrasonic vibration.

That is, conventionally, when processing sludge using ultrasonic waves of a single frequency, problems occur due to a standing wave, which is a phenomenon that shows an energy distribution such that the waveform is stationary. Sludge can be effectively decomposed by using ultrasonic waves having two or more frequencies by the frequency ultrasonic stirring unit 200.

In addition, by installing the first vibration cassette 210 and the second vibration cassette 220 are not directly attached to the outer circumferential surface of the center frame 410, but rather provided away from the center frame 410, the installation position of the vibration cassette or It is possible to increase the solubilization rate of the sludge by increasing the number of vibrating cassettes, if necessary, without limiting the number and the like.

5 is a graph showing the change in the soluble chemical oxygen demand (SCOD) according to the ultrasonic density and irradiation density of the dual frequency by the sludge treatment apparatus using ultrasonic waves according to the present invention, the dual frequency ultrasonic stirring unit 200 according to the present invention If the acoustic density of the dual-frequency ultrasonic waves generated by 198 WL, the solubility of chemical oxygen demand increases to 8000 mg / L or more when the sonication time is approximately 1 hour, so that the solubilization rate of the sludge is greatly increased (approximately 1 hour). While sludge is finely divided up to 92.1%).

The first vibration cassette 210 and the second vibration cassette 220 are provided in the form of a vertically long box, and the plurality of first ultrasonic vibrators 211 is exposed through the front surface of the first vibration cassette 210 The first vibration cassette 210 is installed to be sealed from the outside inside the first vibration cassette 210 so as not to be damaged when the first vibration cassette 210 is locked in the sludge 10, and the plurality of second ultrasonic vibrators 221 It is disposed to be exposed through the front surface of the second vibration cassette 220, but installed inside the second vibration cassette 220 to be sealed from the outside so that it is not damaged when the second vibration cassette 220 is locked in the sludge 10. do.

Dual-frequency ultrasonic stirring unit 200 according to the present invention, the body 100 by the rotational drive of the stirring drive unit 300, depending on the amount and the amount of the sludge 10 to be introduced into the body 100 to be solubilized While stirring the sludge 10 inside, irradiate the dual frequency ultrasonic vibrations of 28 kHz and 40 kHz to the sludge 10 inside the body 100 so as to cross each other, or the sludge 10 by stopping the rotation drive of the stirring drive unit 300 ) When the stirring is stopped, the dual frequency ultrasonic vibrations of 28 kHz and 40 kHz are irradiated to the sludge 10 inside the body 100 to cross each other to destroy the cells of the sludge 10.

At this time, the operation of the stirring driving unit 300, the first ultrasonic vibrator 211, and the second ultrasonic vibrator 221 is controlled by the control unit 700.

Accordingly, even when the stirring is stopped, ultrasonic vibration is evenly transmitted to the sludge 10 inside the body 100 by dual-frequency ultrasonic vibration that is cross-irradiated with each other, but overlaps and synergistic effect due to the ultrasonic vibration of the double-frequency crossing. Solubilization of the sludge 10 can be achieved effectively without generation of dead areas where ultrasonic waves do not reach, but when the center frame 410 is rotated by the driving of the stirring driving unit 300, the dual frequency ultrasonic stirring unit 200 Sludge so that the sludge 10 inside the body 100 is mixed by rotating the first vibration cassette 210 and the second vibration cassette 220 in which the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221 are installed. While stirring (10), solubilization can be made evenly and evenly inside the sludge 10.

On the other hand, since the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221 are installed inside the device, that is, in the liquid phase of the sludge 10 filled inside the body 100, they are attached to the outer wall and irradiated with ultrasonic waves. Less noise than, and the size of the first vibration cassette 210 and the second vibration cassette 220 and the first vibration cassette 210 and the second even if the capacity of the ultrasonic treatment tank, that is, the size of the body 100 is increased By increasing the number of the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221 installed in the vibration cassette 220, it is possible to realize the effect of elastic design.

The vibration output of the dual frequency ultrasonic stirring unit 200 according to the present invention is preferably about 9400 ~ 9800 W.

Accordingly, while solubilization of the sludge 10 flowing into the body 100 is optimized and performed, energy consumption efficiency can be optimized.

2, the agitation driving unit 300 includes a motor installed on the agitation control unit 401 supported by the installation support unit 145 installed on the upper portion of the body 100.

The agitation transmission unit 400 is provided between the agitation driving unit 300 and the center frame 410, as shown in Figs. And, the center frame 410 is rotated at a speed of about 10 rpm when connected to the stirring drive unit 300 through the stirring control unit 401, the first vibration cassette 210 and the second vibration cassette 220 ) It includes two pairs of cassette wiring stir frames 420 arranged so that the other pair is crossed with respect to one pair so as to be fixedly connected to each upper and center frame 410.

Accordingly, as the stirring drive unit 300 is operated by the control of the control unit 700 and the center frame 410 is rotated, the cassette wiring stirring frame 420 is rotated, thereby being fixedly connected to the cassette wiring stirring frame 420. The first vibration cassette 210 and the second vibration cassette 220 may be rotated to stir the sludge 10 inside the body 100.

As shown in Figure 2, the center frame 410, the first vibration cassette 210 and the pair of cassettes so that the upper and lower portions of the second vibration cassette 220 are fixedly coupled to the center frame 410 Plates 411 are provided at positions corresponding to the upper and lower portions of the first vibration cassette 210 and the second vibration cassette 220, respectively, and on the upper side of the cover 140 of the body 100, the center frame 410 An upper bearing part 413 supporting rotation is provided, and a lower bearing part 415 is provided between the inner bottom of the body 100 and the lower part of the center frame 410 to center the rotation of the center frame 410. It is supported stably in the lower part of 410.

Cassette wiring Inside the stirring frame 420, as shown in Fig. 2, the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221, respectively, the wire 421 is connected to be wired to be sealed from the outside.

Accordingly, by preventing the sludge 10 from leaking into the cassette wiring stirring frame 420 when the cassette wiring stirring frame 420 is immersed in the sludge 10, the electric wire 421 is prevented by the sludge 10. It is possible to prevent electrical damage.

On the other hand, the stirring electric motor 400 according to the present invention, as shown in Figure 2, the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221 connected to the electric wire 421 of the center frame 410 In order to prevent twisting by rotation, it is preferable that the center frame 410 further includes a slip ring 430 installed on the cassette wiring stir frame 420.

In addition, the sludge treatment apparatus using ultrasonic waves according to the present invention, as shown in FIGS. 4 and 9, the first ultrasonic vibrator 211 and the second of the dual frequency ultrasonic stirring unit 200 by the electric wire 421 It is preferable to further include an ultrasonic vibrator 500 that is connected to the ultrasonic vibrator 221 and controls the vibration frequency and output of ultrasonic waves.

Accordingly, the control unit 700 controls the ultrasonic vibration unit 500 to control the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221, which generate ultrasonic vibrations of different dual frequencies, respectively or entirely or individually. You can.

Meanwhile, as another embodiment of the present invention, as shown in FIG. 6, the center frame 410 surrounds the first vibration cassette 210 and the second vibration cassette 220 of the dual frequency ultrasonic stirring unit 200. A plurality of stirring blades 417 may be protruded radially on the outer circumferential surface of the enclosed portion.

Accordingly, as the center frame 410 is rotated, the inner sludge 10 surrounded by the first and second vibration cassettes 210 and 220 is stirred by the stirring blades 417 and at the same time. The vortex is formed in the sludge 10 so that the solubilization of the sludge 10 can be further promoted.

On the other hand, as another embodiment of the present invention, as shown in Figure 7, the central frame 410 in the first vibration cassette 210 and the second vibration cassette 220 of the dual frequency ultrasonic stirring unit 200 A plurality of third ultrasonic vibrators 419 may be installed on one side of the plurality of stirring blades 417 that are radially projected on the outer circumferential surface of the enclosed portion.

At this time, the frequency of the ultrasonic vibration irradiated through the third ultrasonic vibrators 419 may be made to match the frequency of the ultrasonic vibration irradiated from any one of the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221, Otherwise, it can be set to other frequencies.

Accordingly, when the center frame 410 is rotated, the inside sludge 10 surrounded by the first vibration cassette 210 and the second vibration cassette 220 is stirred and simultaneously irradiated by the third ultrasonic vibrator 419. Due to the ultrasonic vibrations, micronization of the sludge 10, cell decomposition, and solubilization of the sludge 10 can be further activated.

On the other hand, the sludge treatment apparatus using ultrasonic waves according to another embodiment of the present invention, as shown in FIGS. 8 and 9, the first vibration cassette 210 and the second vibration of the dual frequency ultrasonic stirring unit 200 Level sensor 600 installed vertically on at least one of the cassettes 220 and provided with a sensing contact at a certain height, and first ultrasonic vibrators 211 and second ultrasonic waves based on a result detected by the level sensor 600 The frequency of ultrasonic vibrations to be irradiated from the control unit 700 for controlling the ultrasonic vibration unit 500 so that the vibrators 221 are sequentially operated from bottom to top, and the first ultrasonic vibrator 211 and the second ultrasonic vibrator 221 , It may further include an input unit 710 to receive information about the output, operating time, etc. in advance, and a storage unit 720 to store the information input from the input unit 710.

Accordingly, the control unit 700 is ultrasonic so that the first ultrasonic vibrator 211 and the second ultrasonic vibrators 221 are sequentially operated from below according to the water level of the sludge 10 that is introduced and filled into the body 100. By controlling the vibration unit 500, it is possible to effectively reduce the consumption of energy including electricity.

On the other hand, as shown in Figure 8, the inside of the body 100 of the sludge treatment apparatus using ultrasonic waves according to the present invention may be provided with a heating unit 170 operated by an electric heating method.

Accordingly, the control unit 700 controls the heating unit 170 to maintain the sludge 10 filled and introduced into the body 100 at a constant temperature so that the solubilization of the sludge 10 is more easily performed. You can.

Thus, according to the present invention, the production temperature of the biogas through the medium temperature anaerobic digestion tank, which should be maintained at approximately 35 to 37 ° C., can further increase the production of high-quality biogas, and further improve the performance of the digester. It is possible to provide a used sludge treatment device.

Although described by the above and the technical aspects of the accompanying drawings have been described, the technical spirit of the present invention is for the purpose of description, and is not intended to limit the person skilled in the art of the present invention. It will be understood that various modifications and changes of the present invention can be made without departing from the technical scope of the technical scope of the present invention, which will be described later in the claims.

100: body 200: dual frequency ultrasonic stirring unit
210: first vibration cassette 211: first ultrasonic vibrator
220: second vibration cassette 221: second ultrasonic vibrator
300: stirring drive unit 400: stirring transmission unit
410: center frame 420: cassette wiring stirring frame
421: wire 500: ultrasonic vibration unit

Claims (5)

It is connected to the sludge storage tank is provided so that the sludge flows into the inside, the body installed higher than the sludge storage tank by a support frame;
It is rotatably provided inside the body to allow the sludge inside the body to stir or stop stirring, so that different dual-frequency ultrasonic waves are transmitted to the sludge inside the body so as to cross each other inside the body. A dual frequency ultrasonic stirring unit that solubilizes the sludge with ultrasonic vibration of a dual frequency cross-irradiated with each other;
A stirring drive unit connected to the dual frequency ultrasonic stirring unit to provide a rotation driving force for rotating the dual frequency ultrasonic stirring unit; And
A stirring electric motor provided between the dual frequency ultrasonic stirring unit and the stirring driving unit and having a central frame to transmit rotational driving force provided by the stirring driving unit to the dual frequency ultrasonic stirring unit;
Including,
The dual-frequency ultrasonic agitation unit, a pair of first vibration cassettes provided to be mutually oriented with the center frame interposed therebetween, and provided with respect to the first vibration cassette based on the center frame to cross the center frame A pair of second vibration cassettes arranged to be mutually oriented, and a plurality of first ultrasonic oscillators installed on the front surface of the first vibration cassette to generate ultrasonic frequency vibrations of 25 to 30 kHz, and the second vibrations It is installed on the front of the cassette and includes a plurality of second ultrasonic vibrators that generate ultrasonic frequency vibrations of 35 to 45 kHz.
The stirring transmission unit includes two pairs of cassette wiring stirring frames arranged so that the other pair is crossed with each other so as to be connected to the upper and the center frames of each of the first vibration cassette and the second vibration cassette,
Inside the cassette wiring stirring frame, wires respectively connected to the first ultrasonic vibrator and the second ultrasonic vibrator are wired to be sealed from the outside,
It is further connected to the first ultrasonic vibrator and the second ultrasonic vibrator of the dual-frequency ultrasonic stirring unit by the electric wire further comprises an ultrasonic vibrator for adjusting the vibration frequency and output of the ultrasonic,
The level sensor is provided vertically on at least one of the first vibration cassette and the second vibration cassette of the dual-frequency ultrasonic stirring unit to provide a sensing contact at a predetermined height, and the first sensor based on a result detected by the level sensor. Sludge processing apparatus using ultrasonic waves, characterized in that it further comprises a control unit for controlling the ultrasonic vibrator so that the first ultrasonic vibrator and the second ultrasonic vibrators are sequentially operated from bottom to top.



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