KR20180094173A - Purification device of wastewater used by high tension cavitation - Google Patents

Abstract

The present invention relates to a high efficiency wastewater purification apparatus using high-pressure cavitation, capable of continuously purifying water for a long time, which comprises: a low-pressure pump (22) pumping a firstly filtered water (W2) of a water storage tank (11a); an ozone generator (23a); a high-pressure pump (23b) transmitting the firstly filtered water (W2) pumped by the water storage tank (11a) to a high-pressure purified water (W3); and a purified water tank (21) including a body, a liquid cyclone (21c), a first ejector nozzle (23c), a second ejector nozzle (23d), and a third ejector nozzle (23e).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-efficiency wastewater purification apparatus utilizing a high-

The present invention relates to a highly efficient wastewater purification apparatus that utilizes high-pressure cavitation capable of not only continuous water purification for a long time but also water purification cost.

Methods for removing and purifying solid contaminants contained in wastewater or wastewater (hereinafter referred to as "wastewater") can be broadly divided into solid liquid separation, physico-chemical treatment, biological treatment, and heat treatment depending on the type and content of wastewater have.

A solid liquid separation method is widely used for separating and recovering contaminants contained in waste water and wastewater. The solid liquid separation method includes gravity settling, centrifugation, filtration, and the like.

The gravitational sedimentation method utilizes gravity and is most widely used because of its low processing cost and easy operation management. However, this gravity sedimentation method has a problem that the sedimentation separation efficiency of the contaminants depends on the area of the settling tank, and therefore, when it is difficult to use in a place where the installation area of the treatment apparatus is restricted, it takes a long time for the solid-liquid separation.

Thus, a wastewater purification apparatus using a centrifugal separation method having a high solid-liquid separation efficiency is more widely used. Typical methods are cyclone, which is a kind of centrifugal type solid-liquid separation apparatus. Since the ciclon is solid-liquid separated using the centrifugal force generated by the natural water head or the pump force of the fluid, the installation area of the apparatus is reduced as compared with the gravity sedimentation method. However, And the liquid has a small specific gravity difference or a large amount of contaminants, the efficiency is low. Therefore, it is required to use a filtration method using various kinds of filters together. However, when the centrifugal separation method and the filtration method are used at the same time in order to increase the treatment efficiency, there is a problem that the filter is clogged due to the accumulated contaminants in the filter as the use time elapses. Therefore, There is a problem in that the user must manually clean or remove the pollutant accumulated in the filter regularly by using a separate device or by hand.

As described above, the wastewater purification technique using a liquid cyclone is a process for purifying raw water such as rainwater and domestic wastewater through a dirt removal screen in a primary way, a process for filtering the filtered water to a liquid cyclone, And filtering the filtered water to purify it with clean water.

Conventional wastewater purification apparatuses using the above purification technique require a high-performance pump for sending raw water to a liquid cyclone at a high pressure in order to rotate raw water containing impurities at a sufficient speed in a liquid cyclone, as well as the above- And the manufacturing cost of the wastewater purification apparatus is also low.

In addition, conventionally, the holes formed in the cleaning mat are clogged, and the filtration ability may be lowered. Thus, there is a problem that it is necessary to perform a back washing operation for regulating filtration ability at regular intervals.

Prior Art Document 1. Patent Registration No. 10-0652839 (published on Dec. 1, 2006)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a high-efficiency wastewater treatment system that utilizes high-pressure cavitation, which can provide a constant water purification without stopping purification of wastewater, And to provide it to a purification device.

According to an aspect of the present invention,

A low-pressure pump for pumping the primary filtered water in the reservoir tank,

Ozone generator,

A high-pressure pump for sending the primary filtered water pumped from the storage tank to high-pressure water,

A water tank type body composed of a centrifugal separation chamber, a filtration chamber and a water storage chamber at the boundary between the thick filter and the fine filter, and having a pair of drainage passages at the ends of both side walls; Pressure pump and a jet water supply port communicating with the low-pressure pump, respectively, so that the overflow is communicated to the drainage path in the upper-side opening where the upper end is opened, A liquid cyclone installed to be discharged into the centrifugal separation chamber; A first ejector nozzle for jetting a jet stream generated by mixing an ozone gas of an ozone generator with purified water into a liquid cyclone through a jet water supply port; A second ejector nozzle for mixing the ozone gas generated by the ozone generator with the first water in the centrifugal chamber to eject the generated jet stream into the coarse filter; And a third ejector nozzle configured to mix the ozone gas generated by the ozone generator with the second water in the filter chamber and discharge the jet water stream generated in the filter to the fine filter.

Which is a high-efficiency wastewater purification apparatus utilizing high-pressure cavitation.

The present invention is capable of continuous water purification without stopping the purification of wastewater, and minimizes the cost of water purification for this purpose, thus achieving economical and highly efficient wastewater purification.

1 is a schematic configuration view schematically showing a wastewater purification apparatus according to the present invention,
2 is a view for explaining a high-pressure water purifying unit according to the present invention,
3 is a perspective view for explaining a high-pressure water purifying unit according to the present invention,
4 is a plan view of a water tank of the high-pressure water purifying unit according to the present invention,
5 is a view conceptually showing a state in which a cake is removed from a filter by injection of a high-pressure jet water stream including a bubble group,
6 is an enlarged cross-sectional view of part A of Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a view for explaining a high-pressure water purifying unit according to the present invention, and Fig. 3 is a view for explaining a high-pressure water purifying unit according to the present invention FIG. 4 is a plan view of a water tank of the high-pressure water purifying unit according to the present invention. FIG. 5 conceptually shows the shape of a cake removed from the filter by jetting a high- FIG. 6 is an enlarged cross-sectional view of part A of FIG. 2, and a wastewater purification apparatus according to the present invention will be described with reference to FIGS. 1 to 5. FIG.

1, a wastewater purification apparatus according to the present invention includes a pretreatment unit 10 to which raw water (well water, water, wastewater, etc.) is supplied, Pressure water purifier unit 20. The ultrafiltration membrane 20 is connected to a water outlet (not shown) of the high-pressure water purification unit 20 for separately reinforcing and filtering the filtered water W5 filtered by the high-pressure water purification unit 20 at the rear end of the high- UF), a Nano Filter Membrane (NF), and a Reverse Osmosis Membrane (RO).

The pretreatment unit 10 includes a raw water feed pump (not shown) for sending the raw water W1 from the raw water tank and an edge screen demagnetizing unit for removing the large essential oil OS from the raw water W1 supplied by the raw water feed pump And a device (11).

The edge screen 11a includes a water storage tank 11a and an edge screen 11b which is inclined so that the lower end of the edge is lower than the upper end of the water storage tank 11a and is disposed above the water storage tank 11a. And a collection tank 11c disposed under the stage.

In the pretreatment unit 10, raw water W1 is supplied from the upper end of the edge screen 11b to the upper surface of the edge screen 11b in the raw water supply tank, and in this process, the raw water W1 is supplied to the edge screen 11b, and falls downward while being transmitted. This water drop is stored in the water storage tank 11a as the primary filtered water (water with a large amount of purified water removed) W2.

A part of the raw water W1 such as a large refinery material OS which has not permeated through the edge screen 11b flows along the upper surface of the edge screen 11b and is collected in a collecting tank connected to the lower end of the edge screen 11b 11c.

The high-pressure water purifier unit 20 includes a water tank 21 filled with a purified water at the start of the filtration operation and a primary filtered water W2 in the water storage tank 11a of the edge- A low pressure pump 22 for sending out the high pressure jet stream W4 to the tank 21 and a jet water jetting apparatus 23 for blowing a group of bubbles containing ozone gas OG and jetting the high pressure jet stream W4 into the water tank 21 Equipped.

2 to 5, the operation of the water purification unit 20 will be described in more detail. In the water purification tank 21, two pieces of thick filter 21a and thin filter 21b, And a pair of liquid cyclones 21c opened at upper and lower ends are accommodated. In addition, a pair of drainage passages 21d (see Fig. 4) are provided at the ends of both side walls of the water tank 21, respectively.

The interior of the water tub 21 has a large volume and a large filter 21a and a fine filter 21b facing each other. The interior of the water tub 21 is divided into a centrifuge chamber 21e and a filter chamber 21b. 21f and a low water chamber 21g. At this time, outlets 21e1, 21f1, and 21g1 for drainage are provided on the bottom of each of the indoor areas 21e, 21f, and 21g.

The liquid cyclone 21c is provided in the centrifuge chamber 21e. The liquid cyclone 21c has a lower opening 21c1 on the lower side and a lower opening 21c1 on the lower surface of the water tank 21. In this embodiment, two liquid cyclones 21c are arranged side by side on both sides.

The liquid cyclone 21c includes a primary filtration water supply port 21c2 connected to an outlet of the low pressure pump 22 and a jet water supply port 21c3 connected to an ejector nozzle (described later) of the jet water jet device 23. [ Respectively. The inner diameter of the liquid cyclone 21c becomes narrower from the middle portion to the lower portion.

The liquid cyclone 21c is provided with an upper opening 21c4 on the upper side. The upper opening 21c4 of each liquid cyclone 21c is filled with the water near the water surface in the centrifugal separation chamber 21e at the upper opening 21c4, Is relatively lower than the side wall of the tank (21).

The jet water jet device 23 includes an ozone generator 23a for generating ozone gas OG at a constant concentration and a constant W3 for pumping the primary filtered water W1 of the water storage tank 11a to 8 Mpa A high pressure pump 23b for sending out ozone gas OG at a high pressure such as an ozone generator 23a and first, second and third ejector nozzles 23c, 23d and 23e for sending ozone gas OG from the ozone generator 23a. The ejector nozzle has a structure in which a purified water W3 pumped by the high pressure pump 23b and ozone gas OG generated by the ozone generator 23a are mixed and injected as shown in FIG. (W3) and ozone gas (OG) are mixed at a strong pressure, and then the mixture is instantaneously expanded and ejected to the outside. As a result, the jet flow W4 by the ejector nozzle is strongly discharged.

The ozone gas (OG) is sterilized, deodorized, and decolorized.

The first ejector nozzle 23c mixes the ozone gas OG sent from the ozone generator 23a with the purified water W3 that is sent to the high pressure pump 23b by the high pressure pump 23b and discharges the jet water stream W4 from the discharge port do. The ejector nozzle 23c is connected to the jet water supply port 21c3 of the liquid cyclone 21c. In this embodiment, two first ejector nozzles 23c are provided so as to be paired with the liquid cyclone 21c, respectively.

The second ejector nozzle 23d is installed in the centrifugal separation chamber 21e and is directed toward the coarse filter 21a to feed the first water Wa1 in the centrifugal separation chamber 21e to the filtration chamber 21f, As shown, a plurality of are arranged side by side.

The third ejector nozzle 23e is arranged in parallel to the filter 21b to feed the second water Wa2 of the filter chamber 21f to the low water chamber 21g as shown in FIG.

When the low pressure pump 22, the ozone generator 23a, and the high pressure pump 23b are driven after filling the purified water tank 21 with clear water (clear water), the high-pressure water purifying unit 20 can prevent the liquid cyclones 21c And the jet water stream W4 is injected in the inner circumferential direction of the liquid cyclone 21c.

Thus, when the primary filtered water W2 is swirled in the liquid cyclone 21c together with the high-pressure jet stream W4, an overflow F1 including foreign matter such as oil having a small specific gravity is accumulated in the liquid cyclone 21c Over the upper opening 21c4 and is discharged to the drainage path 21d of the water tank 21 together with the water near the water surface of the centrifugal separation chamber 21e.

Here, the underflow F2 including foreign matter having a large specific gravity is discharged into the water in the centrifugal separation chamber 21e at the lower opening 21c1 of the liquid cyclone 21c, and the foreign matter having a large specific gravity is discharged into the centrifugal separation chamber 21e So that purified water sterilized and deodorized with ozone gas (OG) remains in the upper part of the centrifugal separation chamber 21e.

5, the jet water stream W5 is jetted from the second ejector nozzle 23d at the upper side of the thick filter 21a, and the overflow F2 in the centrifugal chamber 21e 1 water Wa1 is forcedly discharged to the filter chamber 21f by the high-pressure jet flow W5 together with the ozone gas OG.

As a result, foreign matter is filtered by the coarse filter 21a and the clean second water Wa2, which is antibacterial and deodorized by the ozone gas OG, is stored in the filter chamber 21f. The jet water stream W4 which is generated in the filtration process in the centrifugal separation chamber 21e and ejects the cake C such as foreign matter left in the thick filter 21a from the second ejector nozzle 23d is crushed and removed. Generally, in the purification process of waste water and wastewater, various cates (C) such as foam or foreign matters are formed, and the cake (C) remains in the coarse filter (21a) having a relatively rough surface. Of course, such a cake C may weaken the filtering function of the thick filter 21a itself due to continuous deposition, and thus periodic removal is necessary. However, in the wastewater purification apparatus according to the present invention, the cake C is separated from the thick filter 21a and precipitated by instantaneous cavitation caused by the jet water flow W5 strongly ejected from the ejector nozzle, It is possible to remove the cake C on the surface of the thick filter 21a. As a result, since the filtering function of the thick filter 21a can be continued, the replacement period of the thick filter 21a can be extended.

In addition, the jet water stream W6 is jetted from the third ejector nozzle 23e on the upper side of the thin filter 21b so that the second water Wa2 in the filter chamber 21f together with the ozone gas OG And is forcedly drained to the low water chamber 21g by jet water W6.

As a result, foreign substances are filtered by the thin filter 21b in the low water chamber 21g, and clean purified water W7, which is antibacterial and deodorized by the ozone gas OG, is stored. Since the clearing of the cake C formed on the surface of the thin filter 21b has been described above, the description thereof is omitted here.

6, the wastewater purification apparatus of the present embodiment further includes a bubble-fired vibrator for removing the cake C from the space other than the cavitation. For this purpose, the bubble-fired vibrator

A supporter 311 provided at the bottom of the water tank 21 for supporting the coarse filter 21a, a first conveying pipe 312 for conveying the ozone gas OG along the supporter 311, A base 31 composed of a discharge nozzle 313 drawn from the pipe 312 and discharging a large amount of ozone gas (OG) to the lower end of the thick filter 21a;

A plate body 321 which is placed in the supporter 311 so as to cover the section other than the discharge section of the jet water stream W5 in the coarse filter 21a and a second conveyor 322 for conveying the ozone gas OG along the plate body 322 A fins 32 composed of a pipe 322 and a gas nozzle 323 drawn from the second transfer pipe 322 and emitting ozone gas OG to the thick filter 21a;

A buffer panel 34 reinforced between the plate body 321 and the supporter 311 to prevent the plate body 321 from shaking out;

And an oscillating member 33 for oscillating the plate body 321.

The ozone gas OG supplied from the separate gas pipe 31 is discharged to the lower end of the thick filter 21a through the discharge nozzle 313 on the first transfer pipe 312 of the base 31. [ The foreign matter such as the cake C intensively accumulated in the corners of the centrifuge chamber 21e can be taken out of the thick filter 21a and the stable filtering function of the thick filter 21a can be maintained.

The ozone gas OG of the first transfer pipe 312 is transferred to the second transfer pipe 322 of the valve element 321 and is strongly fired through the thick nozzle 21a through the gas nozzle 323. Therefore, the cake C accumulated in the section that is not affected by the cake C located in some places of the thick filter 21a, in particular, the jet water stream W5, is supplied to the ozone gas OG emitted from the gas nozzle 323 Is physically pushed out of the coarse filter 21a and deposited on the bottom of the centrifuge 21e.

On the other hand, the valve element 321 physically applies force to the cake C together with the ozone gas OG while vibrating with the periodic vibration force applied by the vibration member 33, thereby more efficiently removing the cake C Lt; / RTI > Therefore, the coarse filter 21a has a clean water flow structure without a foreign matter at all times, so that the first water Wa1 of the centrifugal separation chamber 21e can flow smoothly through the coarse filter 21a, W5), it can be transferred to the filter room 21f in a clean and purified state.

The various cakes C deposited on the coarse filter 21a are separated from the coarse filter 21a and are continuously deposited on the centrifuge 21e and deposited on a region not adjacent to the coarse filter 21a, It is possible to easily remove the water from the water tank 21.

The bubble-fired vibrator may also be installed in the fine filter 21b installed in the filter chamber 21f. Since the structure and connection structure of the bubble-fired vibrator constituted in the thin filter 21b are the same as the structure and the structure described above, a description thereof will be omitted here.

As a result, the thick filter 21a and the fine filter 21b can maintain a clean appearance state at all times because various cakes C in various places are continuously removed by the bubble-fired vibrator, Water (Wa1, Wa2) can maintain a clean environmental condition.

As described above, the present invention makes it possible to secure the speed of the swirling flow in the liquid cyclone 21c without sending the primary filtered water W2 into the liquid cyclone 21c at a high pressure. Therefore, it is not necessary to provide a high-performance pump capable of injecting raw water including foreign matter at a high pressure, and manufacturing cost is reduced.

In the present invention, the high-pressure jet stream W4 containing ozone gas (OG) is injected toward the upper portion of the thick filter 21a and the upper portion of the narrow filter 21b, It is possible to prevent deterioration of the filtration capability of the coarse filter 21a and the fine filter 21b without back washing between the thick filter 21a and the fine filter 21b because the foreign matter cake C remaining on the upper portion of the thick filter 21a and the fine filter 21b is not fixed. Can be prevented. Therefore, the continuous cleaning operation can be performed for a longer time.

The filtration speed can be improved because the present invention is press-fitted into the water-thick filter 21a and the thin filter 21b to be filtered by the high-pressure jet streams W4, W5 and W6, respectively.

In addition, the present invention is characterized in that ozone gas (OG) is supplied to the bubbles of the centrifugal separation chamber 21e of the water purification tank 21, the filtration chamber 21f, and the jet streams W4, W5 and W6 jetted into the low- ), So that a clean purified water W7 can be generated.

10; A preprocessing unit 11; Edge screen vibration suppression device
11a; A water storage tank 11b; Edge screen
11c; Collecting tank 20; High Pressure Water Purifier Unit
21; A water tank 21a; Thick filter
21b; Thin filter 21c; Liquid cyclone
21d; A drainage passage 21e; Centrifuge chamber
21f; Fruit 21g; Low chamber
22; Low pressure pump 23a; Ozone generator
23b; High pressure pump 23c; The first ejector nozzle
23d; A second ejector nozzle 23e; Third ejector nozzle

Claims (3)

A low-pressure pump 22 for pumping the primary filtered water W2 of the water storage tank 11a,
The ozone generator 23a,
A high pressure pump 23b for sending the primary filtered water W2 pumped in the water storage tank 11a to the high pressure water W3,
A centrifugal separator 21e and a filter chamber 21f and a low water chamber 21g at the boundary between the thick filter 21a and the thin filter 21b and a pair of drainage passages 21d are formed at the ends of both side walls A body in the shape of a water tank; The primary filtrate water supply port 21c2 is disposed adjacent to the drainage passage 21b so that the overflow F1 is transmitted to the drainage passage 21b in the upper opening 21c4 with the upper end opened, And a liquid cyclone 21c which communicates with the jet water supply port 21c3 and is installed such that the underflow F2 is discharged to the centrifuge chamber 21e at the lower opening 21c1 with the lower end opened; A first ejector nozzle (not shown) for ejecting the jet water stream W4 generated by mixing the ozone gas OG of the ozone generator 23a with the purified water W3 into the liquid cyclone 21c through the jet water supply port 21c3 23c); A second ejector nozzle 23d for ejecting the jet water stream W5 generated by mixing the ozone gas OG of the ozone generator 23a with the first water Wa1 of the centrifugal chamber 21e to the thick filter 21a )and; A third ejector nozzle 23e for ejecting the jet water stream W6 generated by mixing the ozone gas OG of the ozone generator 23a with the second water Wa2 of the filter chamber 21f to the fine filter 21b, (21)
A high-efficiency wastewater purification apparatus utilizing high-pressure cavitation. The method according to claim 1,
An edge screen 11b having a filter function which is disposed above the water storage tank 11a so as to be lower than the upper end of the water storage tank 11a and disposed below the lower end of the edge screen 11b; A pretreatment unit 10 composed of a collecting tank 11c,
And a high-pressure wastewater purification apparatus utilizing the high-pressure cavitation. 3. The method according to claim 1 or 2,
A supporter 311 provided at the bottom of the water tub 21 for supporting the coarse filter 21a, a first conveying pipe 312 for conveying the ozone gas OG along the supporter 311, A base 31 composed of a discharge nozzle 313 drawn from the transfer pipe 312 to discharge a large amount of ozone gas (OG) to the lower end of the thick filter 21a; A plate body 321 which is placed in the supporter 311 so as to cover the section other than the discharge section of the jet water stream W5 in the coarse filter 21a and a second conveyor 322 for conveying the ozone gas OG along the plate body 322 A fins 32 composed of a pipe 322 and a gas nozzle 323 drawn from the second transfer pipe 322 and emitting ozone gas OG to the thick filter 21a; A buffer panel 34 reinforced between the plate body 321 and the supporter 311 to prevent the plate body 321 from shaking out; A vibrating member 33 that vibrates the plate body 321, and a bubble-
And a high-pressure wastewater purification apparatus utilizing the high-pressure cavitation.

Images