WO2020040375A1

WO2020040375A1 - Cavitation unit

Info

Publication number: WO2020040375A1
Application number: PCT/KR2019/000786
Authority: WO
Inventors: 이제이콥부희
Original assignee: 이제이콥부희
Priority date: 2018-08-23
Filing date: 2019-01-18
Publication date: 2020-02-27
Also published as: KR102067575B1

Abstract

The present invention relates to a cavitation unit comprising: a motor; a shaft axially mounted on an axle of the motor; a plurality of impellers installed at predetermined intervals on a circumferential surface of the shaft; and a housing surrounding the shaft and the plurality of impellers, wherein the plurality of impellers include cutter portions protruding obliquely in one direction toward an inner surface of the housing, and the inner surface of the housing facing the cutter portion has formed therewith first cavitation grooves recessed to an arbitrary predetermined depth.

Description

Cavitation unit

The present invention relates to a cavitation unit, and more specifically, by introducing wastewater having a high viscosity, and then crushing, oxidizing, and reducing the sludge by the cavitation phenomenon, thereby discharging the sludge to a homogenized microparticle state without odor and viscosity. The present invention relates to a cavitation unit that can dramatically improve the purification efficiency of wastewater, such as eliminating odor complaints, increasing dehydration rate, reducing digestion time, and increasing yield of methane gas.

In general, the treatment of wastewater, such as livestock manure, which is highly viscous, includes physical treatment using filtration, sedimentation, flotation, membrane separation, and ultraviolet rays, chemical treatment using reduction, flocculation, and adsorption methods, and microorganisms. Biodegradation process and the like.

Among these, the treatment process of the livestock manure, etc. which are commonly used, takes a large part in biological treatment process.

In these biological treatment processes, the key factors for decomposing organic matter using microorganisms are organic matter (food for microorganisms), temperature, pH, and dissolved oxygen. Among these, dissolved oxygen is an important factor in determining the efficiency of biological treatment process. .

However, in the biological treatment process, as the blower and the diffuser are used to supply oxygen, the power consumption is increased to operate the blower, and the oxygen saturation ratio is low compared to the power consumption, thereby causing a large economic burden. There was this.

In addition, the conventional biological treatment process, because the facility is large, it is necessary to secure a certain size of space, as well as costly to manage these facilities is a big economic burden for small-scale wastewater treatment There was this.

In particular, in the case of wastewater having high viscosity, such as livestock manure, the purification efficiency is poor when it is purified by a biological treatment process.

Prior art documents in the technical field to which the present invention belongs include Korean Patent Publication No. 10-2016-014112.

The present invention has been made in view of the above-mentioned problems, the technical problem to be solved by the present invention, including a large number of sludges such as livestock manure, high viscosity viscous sludge generated in wastewater or sewage treatment plants, etc. By purifying by phenomena by crushing, oxidizing and reducing, and purifying by discharging the sludge in the form of fine particles with homogeneous odor and viscosity, it not only reduces the economic burden on the treatment plant but also eliminates odor complaints, increases dehydration rate, and extinguish time. It is to provide a cavitation unit that can improve the economics by direct or indirect effects or effects because it is easy to purify the waste water, such as shortening and increasing the yield of methane gas.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

Cavitation unit according to an embodiment of the present invention for solving the above problems, a motor; A shaft in contact with an axis of the motor; A plurality of impellers installed at predetermined intervals on the circumferential surface of the shaft; And a housing surrounding the shaft and the plurality of impellers, wherein the plurality of impellers include a cutter part protruding obliquely in one direction toward an inner surface of the housing, the inner surface of the housing facing the cutter part. A first cavitation groove is formed that is recessed to any constant depth.

In this case, the housing may include a plurality of partition walls extending from an inner surface to partition each cutter of the plurality of impellers to form a zigzag flow path.

Here, the plurality of partition walls, the end of the second cavitation is arranged to be spaced apart from the circumferential surface of the shaft by a predetermined interval, the second cavitation which is recessed to a certain depth on the circumferential surface of the shaft that is in the same line with the plurality of partition walls Grooves may be formed.

In addition, the shaft may have a plurality of seating recesses formed in a circumferential direction in a length direction, and a plurality of stepped portions defining the plurality of seating recesses may be formed, and the second cavitation groove may be formed in the circumferential surface of the stepped portion. .

On the other hand, the surface facing the inner surface of the housing in the cutter portion may form a flat plane portion.

Other specific details of the invention are included in the detailed description and drawings.

According to the cavitation unit according to the embodiment of the present invention, viscous sludge generated in sewage wastewater or sewage treatment plant having high viscosity, including a large number of sludges such as livestock manure, is purified by crushing, oxidation, and reducing by cavitation. Purified and discharged as sludge in the form of homogenized fine particles without odor and viscosity, resulting in easy purification of waste water, such as eliminating malodorous complaints, increasing dehydration rate, reducing digestion time, and increasing yield of methane gas without any economic burden on the treatment plant. By providing the effect can be provided directly or indirectly to improve the economics.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a front view showing the appearance of the cavitation unit according to the embodiments of the present invention.

2 is a partial cross-sectional view showing the internal configuration of the cavitation unit according to the first embodiment of the present invention.

3 is an enlarged cross-sectional view of the main portion of FIG. 2;

Figure 4 is a perspective view of the state in which the impeller is mounted on the shaft in the cavitation unit according to the first embodiment of the present invention.

5 is an exploded perspective view of FIG. 4.

FIG. 6 is a front view of the shaft and impeller of FIG. 4 located inside the housing; FIG.

7 and 8 are perspective views of an impeller applied to the cavitation unit according to the first embodiment of the present invention.

9 is a plan view of FIG.

10 is a partial cross-sectional view showing the internal configuration of the cavitation unit according to the second embodiment of the present invention.

11 is an enlarged cross-sectional view of the main portion of FIG. 10;

12 is a perspective view of a state in which an impeller is mounted on a shaft in a cavitation unit according to a second embodiment of the present invention.

13 is an exploded perspective view of FIG. 12.

FIG. 14 is a front view of the shaft and impeller of FIG. 12 located inside the housing; FIG.

15 and 16 are perspective views of an impeller applied to a cavitation unit according to a second embodiment of the present invention.

17 is a top view of FIG. 14;

18 is a front view showing another type of cavitation unit according to embodiments of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Thus, in some embodiments, well known process steps, well known structures and well known techniques are not described in detail in order to avoid obscuring the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, including and / or comprising means not to exclude the presence or addition of one or more other components, steps, and / or actions other than the components, steps, and / or actions mentioned. Used as. And “and / or” includes each and all combinations of one or more of the items mentioned.

In addition, the embodiments described herein will be described with reference to perspective, sectional, side and / or schematic views which are ideal exemplary views of the present invention. Accordingly, shapes of the exemplary views may be modified by manufacturing techniques and / or tolerances. Therefore, the exemplary embodiments of the present invention are not limited to the specific forms shown, but include changes in forms generated according to manufacturing processes. In addition, each component in the drawings shown in an embodiment of the present invention may be shown to be somewhat enlarged or reduced in consideration of the convenience of description.

Hereinafter, a cavitation unit according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing the external appearance of the cavitation unit according to the embodiments of the present invention.

Referring to FIG. 1, the cavitation unit 100 according to the exemplary embodiments of the present invention may include a motor 110 that receives an electric signal and provides a driving force, and crushes waste water introduced as the motor 110 rotates. By oxidizing and reducing, the waste water may be composed of a pumping unit 200 for separating and purifying the liquid into sludge.

Here, an inlet 202 may be formed at one side of the pumping unit 200 for introducing wastewater, and an outlet 204 may be formed at the other side.

Since the pumping unit 200 may vary in diameter and length according to the capacity of the cavitation unit, the diameter and length thereof are not limited.

2 is a partial cross-sectional view showing the internal configuration of the cavitation unit according to the first embodiment of the present invention, Figure 3 is an enlarged cross-sectional view of the main part of FIG.

In addition, Figure 4 is a perspective view of a state in which the impeller is mounted on the shaft in the cavitation unit according to the first embodiment of the present invention, Figure 5 is an exploded perspective view of Figure 4, Figure 6 is a shaft and the impeller of Figure 4 housing It is a front view of the state located inside.

7 and 8 are perspective views of an impeller applied to the cavitation unit according to the first embodiment of the present invention, and FIG. 9 is a plan view of FIG.

First, as shown in FIGS. 2 and 3, the cavitation unit 100 according to the first embodiment of the present invention includes a motor 110 having a driving force by receiving an electric signal, and the motor 110. It may include a pumping unit 200 for crushing, oxidized, reduced by the cavitation phenomenon and discharged to the outside as the waste water introduced as the shaft is laid and rotated.

Here, one side of the pumping unit 200 is formed with an inlet 202 for introducing waste water, the other side is introduced into the inlet 202 to discharge the sludge in the form of powder, crushed, oxidized, reduced by the cavitation phenomenon to the outside And an outlet 204 to make.

3 to 5, as shown in FIGS. 3 to 5, a shaft insertion hole is formed at the center so that the shaft of the motor 110 is built up, and the plurality of seating recesses 222 are spaced around the outer surface. Is formed in a state in which the shaft 220, the plurality of impeller 300 is installed around the seating recess 222 of the shaft 220 and the ends of the plurality of impeller 300 by a predetermined interval spaced apart the shaft ( 220 and the impeller 300 may be configured to include a housing 210 surrounding the housing.

Here, a plurality of stepped portions 226 may be formed around the outer surface of the shaft 220 at regular intervals to partition the plurality of seating recesses 222.

In the cavitation unit 100 according to the first embodiment of the present invention, all six mounting recesses 222 are formed around the outer surface of the shaft 220 as an example. However, this is only one embodiment. However, the present invention is not limited thereto, and the number thereof may vary according to the capacity of the cavitation unit 100.

4 to 6, among the plurality of seating recesses 222 formed around the outer surface of the shaft 220, one seating recess 222 is provided with five impellers 300 all around the perimeter. As an example, this is only an example, and the present invention is not limited thereto, and the number and size thereof may vary according to the capacity of the cavitation unit 100.

7, 8, and 9, the impeller 300 applied to the cavitation unit 100 according to the embodiment of the present invention is mounted on a part of the mounting recess 222 of the shaft 220 to be bolted. It may include a base portion 310 is fixedly coupled by a coupling means such as, and a cutter portion 330 protruding from the upper surface 332 of the base portion 310.

The base portion 310 of the impeller 300 may be rounded to be seated on the seating recess 222 formed around the outer surface of the shaft 220.

At this time, when all five impellers 300 are installed in one seating recess 222 formed around the outer surface of the shaft 220 as in the first embodiment of the present invention, each impeller 300 is It may be formed round in length with an angle of approximately 72 degrees.

In addition, one end of the base portion 310 of the impeller 300 forms the first stepped portion 312 in a form in which a lower portion thereof is inwardly recessed, and the other end of the base portion 310 has a second stepped portion ( By forming the 314, it can be connected to the other impeller 300 adjacent to each other in a stacked manner, and thus can be stably seated around the circumference of the mounting recess 222 of the shaft 220.

Here, a coupling hole 320 is formed at one side of the base portion 310 of the impeller 300 in the longitudinal direction, and a coupling member is inserted through the coupling hole 320 to the impeller 300 with respect to the shaft 220. Can be combined.

Therefore, the fastening hole 224 may be formed in the seating recess 222 of the shaft 220 in a number corresponding to the number of the impeller 300.

Meanwhile, the cutter part 330 is formed to protrude from the upper surface 332 of the base part 310. Referring to FIGS. 7, 8, and 9 again, the cutter part 330 is gradually inclined from one side to the other side. It may be formed in the form that the height is increased.

At this time, when the cutter unit 330 is viewed in a plane, one side of the upper surface 332 forms a straight line, while the other side forms a straight line from the higher side to the lower side in a certain length. Subsequently, the width is narrowed toward the lower side, and as shown in FIG. 9, the upper surface 332 of the cutter portion 330 may have a substantially rhombic shape.

In addition, the first side 334 having one side is a straight line forms a triangular shape, and the second side 336, which is a portion forming a straight line at the other side, has a square shape having a rhombic shape, and the second side 336 is formed. The third side surface 338, which is an inclined portion in plan view from the to the lowest height portion, has a triangular shape.

In this case, since the inclination angle of the third side surface 338 may vary according to the length of the second side surface 336, the inclination angle of the third side surface 338 may be changed without being limited.

As shown in FIGS. 2 to 6, the impellers 300, which may be configured as described above, are installed in the circumferential direction with respect to the seating recesses 222 of the shaft 220, respectively, on the shaft 220. The installed impellers 300 have a shape in which the cutter parts 330 protrude obliquely toward one side in the rotation direction.

At this time, the ends of the cutters 330 of the impellers 300, that is, the corners having the highest height from the base 310, are spaced apart from the inner surface of the housing 210 by a predetermined interval.

Accordingly, when the motor 110 is driven by applying an electrical signal to the motor 110, the shaft 220 in which the motor shaft 112 is arranged is rotated in cooperation with the shaft 110, and the shaft is rotated in accordance with the rotation of the shaft 220. Impellers 300 installed at predetermined intervals on the periphery of each seating recess 222 of the 220 are also interlocked with each other.

At this time, the housing 210 is not rotated, and as the impeller 300 rotates with respect to the fixed housing 210, the highly viscous wastewater supplied between the inner surface of the housing 210 and the impeller 300 is impeller. Crushing is performed by the cutter parts 330 of the 300, and an operation relationship thereof will be described later in detail.

On the other hand, the first cavitation groove 212 which is recessed by a predetermined depth along the circumference of the circumference may be formed at a position colinear with the cutter portion 330 of the impeller 300 on the inner surface of the housing 210.

That is, a plurality of first cavitation grooves 212 may be formed on the inner surface of the housing 210 at predetermined intervals at positions colinear with the cutter portion 330 of the impeller 300 along the circumference.

In addition, the housing 210 may be formed with partition walls 214 extending from the inner surface thereof to partition the cutter portions 330 of the impellers 300 laterally adjacent thereto.

In this case, each of the partition walls 214 may be disposed between the cutter portions 330 of the impellers 300, and ends thereof may be spaced apart from the stepped portion 226 of the shaft 220 by a predetermined distance.

In addition, a second cavitation groove 228 may be formed in the stepped portion 226 of the shaft 220, which is recessed by a predetermined depth along the circumference thereof.

Thus, referring to FIG. 3, wastewater flowing from the inlet 202 passes through a flow path 216 formed in a zigzag form by partition walls 214 formed in the housing 210, and this flow path 216. The first cavitation groove 212 and the second cavitation groove 228 is located on the bar, while the waste water passes through the flow path 216 by the first cavitation groove 212 and the second cavitation groove 228 Cavitation action is made, the operation of the cavitation unit according to the first embodiment of the present invention will be described as follows.

As described above, when the motor 110 is driven by applying an electrical signal to the motor 110, the shaft 220 in which the motor shaft 112 is arranged is rotated in association with each other, and the rotation of the shaft 220 is performed. Accordingly, the impellers 300 installed at predetermined intervals on the circumferential surfaces of the seating recesses 222 of the shaft 220 are also interlocked with each other.

At this time, the high viscosity waste water to be purified is introduced through the inlet 202 of the pumping unit 200, the inflow is made between the inner surface of the housing 210 and the impeller (300).

That is, the wastewater flowing through the inlet 202 is a flow path 216 formed in the space between the partition walls 214 formed to extend from the inner surface of the housing 210 and the cutter portions 330 of the impellers 300. Inflow will occur.

Therefore, the waste water introduced into the flow path 216, which is a space between the partition walls 214 and the cutter portions 330 of the impellers 300, that is, the waste water having high viscosity is mixed by the centrifugal force of the rotating impellers 300. (Mixing) is made by the cutter portion 330 of the impeller 300 is made to be crushed.

That is, the cutters 330 of the impellers 300 are formed to be inclined in one direction so that sludges having large particles may be crushed by the cutters 330 according to the shape of a cutter.

Here, the interval between the ends of the cutter portions 330 of the impeller 300 and the inner surface of the housing 210 is formed to be narrow by a predetermined interval, so that the sludge passing through this interval is crushed by the cutter portions 330 You lose.

In addition, the waste water including the sludge by the centrifugal force due to the rotation of the impeller 300 passes through the flow path 216, the second cavitation groove 228 formed in the stepped portion 226 of the shaft 220, and the housing ( Sludge and water may be separated as bubbles are generated in the water contained in the wastewater as they are sequentially introduced into the first cavitation groove 212 formed in the inner surface of the 210 and then oxidized and reduced by the cavitation phenomenon. have.

In addition, as the plurality of impellers 300 rotates at high speed, the sludge of the wastewater is increased in temperature due to frictional force and cavitation bubbles (approximately 5000K) and at the same time, the suspended particles of the sludge are further increased by physicochemical oxidation and reduction reactions. Finely pulverized, viscous decomposed and homogenized.

Due to this effect, hydrolysis of the solid organic matter contained in the sludge is promoted, and the purification performance can be exhibited high.

Therefore, the first cavitation that is disposed through the inlet 202, that is, the waste water sludge having a high viscosity, is crushed by the cutter portion 330 of the impeller 300 and is sequentially disposed on the zigzag channel 216. The homogenized microparticles of the sludge by the cavitation reaction by the groove 212 and the second cadence groove 228 is hydrolyzed to promote water solubility can be reduced while purifying various organic substances contained in the waste water sludge, accordingly Homogenized and viscous homogenized sludge discharged through the outlet 204 reduces the residence time in the digester due to high extinguishing efficiency and at the same time increases the yield of methane gas.

In particular, a flow path 216 through which the waste water moves by the partition walls 214 is formed in a zigzag shape and formed long, and the first cavitation groove 212 and the second cavitation groove are sequentially formed on the flow path 216. As 228 is disposed, the cavitation reaction can be further improved.

In addition, the homogenized sludge not only has no odor, but also has a high solid-liquid dehydration rate, thereby improving sludge reduction rate.

As described above, according to the cavitation unit 100 according to the first embodiment of the present invention, wastewater having high viscosity, such as sludge generated in livestock manure or sewage treatment plant, is crushed, oxidized, and reduced to sludge and water. Easily separating solids and discharging it in a homogeneous sludge in the form of fine particles with improved dewatering rate, thus greatly improving the efficiency of purifying highly viscous wastewater without installing expensive facilities in existing wastewater livestock and sewage treatment plants. As a result, economic benefits will have a great effect.

For reference, in the case of the cavitation unit 100 according to the first embodiment of the present invention, an example of treating wastewater having a high viscosity such as sludge generated in livestock manure or sewage treatment plant has been described as an example. It is only a thing, but is not limited to this, it can be applied to the purification of various wastewater, including sludge, such as various domestic sewage, factory sewage.

On the other hand, in the case of the cavitation unit 100 according to the first embodiment of the present invention, the inlet 202 is formed on one side of the pumping unit 200, the outlet 204 is formed on the other side, the inlet 202 After the wastewater is introduced through), the sludge in the form of homogenized fine particles without odor and viscosity is discharged through the outlet 204, but is not limited thereto, and the direction of rotation of the motor 110 is described. By changing, the waste water may be introduced through the outlet 204, and then the sludge in the form of homogenized fine particles without odor and viscosity may be discharged through the inlet 204.

Second Embodiment

10 is a partial cross-sectional view showing the internal configuration of the cavitation unit according to a second embodiment of the present invention, Figure 11 is an enlarged cross-sectional view of the main portion of Figure 10, Figure 12 is a cavitation unit according to a second embodiment of the present invention Is a perspective view of the state in which the impeller is mounted on the shaft.

FIG. 13 is an exploded perspective view of FIG. 12, FIG. 14 is a front view of the shaft and the impeller of FIG. 12 located inside the housing, and FIGS. 15 and 16 are applied to the cavitation unit according to the second embodiment of the present invention. Is a perspective view of an impeller.

17 is a top view of FIG.

In the description of the cavitation unit according to the second embodiment of the present invention with reference to FIGS. 10 to 17, the same parts as in the cavitation pump unit according to the first embodiment will be described with the same reference numerals. do.

10 to 17, in the cavitation unit 100 according to the second embodiment of the present invention, when compared to the cavitation unit according to the first embodiment, the cutter unit 330 end of the impeller 300 is flat. (Flat) is formed so that the end of the cutter portion 330 of the impeller 300 is only a difference formed by the flat portion 340, the rest of the rest of the configuration may be all the same.

As such, when the end of the cutter 330 of the impeller 300 is flat to form the flat portion 340, the cutter 330 of the impeller 300 and the waste water introduced through the inlet 202 may be formed. By increasing the contact area, the cavitation effect can be further improved.

In addition, referring to Figure 14, as the end of the cutter portion 330 of the impeller 300 is formed as a flat portion 340, it is possible to reduce the inner diameter of the housing 210, thereby Since the interval AB between the outer surface and the housing 210 can be reduced, the cavitation effect can be further improved.

That is, the cutter 330 end of the impeller 300 is formed as a flat portion 340 of the flat portion 340 to reduce the inner diameter of the housing 210, the outer surface and the housing ( As the inner surface spacing of 210 is reduced, the flow rate of the waste water is faster, and thus the cavitation effect can be further improved.

In the case of the cavitation unit 100 according to the second embodiment of the present invention, as described above, the first end of the cutter unit 330 of the impeller 300 is formed as a flat portion 340 as described above. Since the cavitation unit and the rest of the configuration and operation relationship according to the embodiment is the same, repeated description thereof will be omitted.

For reference, FIG. 18 is a front view illustrating another type of cavitation unit according to embodiments of the present disclosure. When a large capacity is applied, the pumping unit 200 and the motor 110 are disposed at a predetermined interval. In this case, the impellers according to the previous embodiments may be applied to implement the same effect.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

* Explanation of Codes *

100: cavitation unit 110: motor

112: motor shaft 200: pumping part

202: inlet 204: outlet

210: housing 212: first cavitation groove

214: partition wall 216: euro

220: shaft 222: mounting recess

224 fastening hole 226 step

228: second cavitation groove 300: impeller

310: base portion 320: coupling hole

330: cutter portion 332: upper surface

334: first side 336: second side

338: third side 340: flat portion

Claims

motor;

A shaft in contact with an axis of the motor;

A plurality of impellers installed on the circumferential surface of the shaft at predetermined intervals; And

A housing surrounding the shaft and the plurality of impellers,

The plurality of impellers,

It includes a cutter that protrudes inclined in one direction toward the inner surface of the housing,

Cavitation unit, characterized in that the inner surface of the housing facing the cutter portion is formed with a first cavitation groove recessed to any predetermined depth.
The method of claim 1,

The housing is

And a plurality of partition walls extending from an inner surface to partition each cutter of the plurality of impellers so as to form a zigzag flow path.
The method of claim 2,

The plurality of partition walls,

Its ends are disposed spaced apart from the circumferential surface of the shaft,

Cavitation unit, characterized in that the circumferential surface of the shaft which is in the same line as the plurality of partition walls are formed with a second cavitation groove recessed to any predetermined depth.
The method of claim 3, wherein

The shaft is provided with a plurality of seating recesses in the longitudinal direction on the circumferential surface,

A plurality of stepped parts for partitioning the plurality of seating recesses are formed,

Cavitation unit, characterized in that the second cavitation groove is formed in the peripheral surface of the stepped portion.
The method according to any one of claims 1 to 4,

Cavitation unit, characterized in that the surface facing the inner surface of the cutter in the cutter portion forms a flat plane portion.