KR100463575B1 - Clarifier having filter media and a sludge collector with a back fresh function - Google Patents

Abstract

The present invention relates to an apparatus for separating and removing particles contained in a liquid, and more particularly, among the solids contained in the liquid, precipitated solids are removed by precipitation by gravity, and the fine flocs and particles that do not precipitate are suspended in the sedimentation basin. Filtration is removed by filtration means provided at the upper portion, and as the filtration proceeds, the solid matter attached to the surface of the filtration means is detached by a backwashing means such as an ultrasonic wave or a vibration generator or a brush so that the filtration performance is regenerated. The means relates to a sedimentation basin equipped with a filtration function to operate with the sludge collector, according to the present invention is capable of effective solid-liquid separation even in a mixed liquid with a high solids concentration, excellent removal efficiency of fine particles, poor sedimentation, head loss This eliminates the need for a pressure pump and does not waste clean water for backwashing It does not require a separate site and structure for installing the filter, and can be easily applied to existing sedimentation basins that are in operation.

Description

Clarifier having filter media and a sludge collector with a back fresh function}

The present invention relates to an apparatus for separating and removing particles contained in a liquid, and more particularly, among the solids contained in the liquid, precipitated solids are removed by precipitation by gravity, and the fine flocs and particles that do not precipitate are suspended in the sedimentation basin. Filtration is removed by filtration means provided at the upper portion, and as the filtration proceeds, the solid matter attached to the surface of the filtration means is detached by a backwashing means such as an ultrasonic wave or a vibration generator or a brush so that the filtration performance is regenerated. The means relate to a sludge collector equipped with a backwashing function and a filtration means which is operated with a sludge collector.

In the solid-liquid separation process of sewage treatment facilities, water treatment facilities or production processes, various devices such as hydrocyclones using centrifugal force, settler using gravity, and filters have been developed and used. However, hydrocyclones have low removal efficiency for solids having a small specific gravity or fine particle diameter, and solids having a large particle size and a specific gravity can be removed well, but flocculants having a small specific gravity cannot be removed. There is a problem that means must be provided.

The filter can effectively remove the fine particle size and has an excellent treatment efficiency, but since solid matter accumulates on the surface of the filtration module, the filtration rate is reduced and the required pressure is increased. There is a problem that cannot be used for the solid-liquid separation of the high reaction solution. In addition, in the conventional filter, the clean fluid is pumped in the opposite direction to the filtration to frequently back-wash the solid accumulated on the filter bed or the surface of the filtration module, resulting in low operation rate and contaminating the clean water used in the backwashing process. However, its use is limited in liquids with high solids concentrations.

In addition, the conventional filter separated from the sedimentation process has to build a structure for the filter on a separate site, the pressure filter requires a pump and power, which is inexpensive to install and operate costs, and the gravity filter that does not need to be pumped has a large filtration area. Since it takes a lot of site, there is a problem that the size of the filter is huge.

Accordingly, the present invention has been made to solve the above problems, by installing a filtering means with low head loss in the upper part of the sedimentation basin so that the sedimentary solids are precipitated by gravity, the suspended solids are removed by the filtering means to remove the solids It can be applied to liquids with high efficiency and high solids concentration, and it is equipped with sludge collector and filtration means equipped with backwashing function that can be easily applied to conventional gravity sedimentation basin without requiring separate site or constructing structure. The purpose is to provide.

A sludge collector equipped with a backwashing function and a filtration means according to the present invention for achieving the above object is provided with a collecting means in the form of a water channel or a pipe for collecting the symbol water to flow out to the outside, A plurality of inlets are perforated, and the collecting means is provided with a filtering means composed of a porous filtration module made of fiber, ceramic or metal, and installed so that the collecting means inlet and the outlet of the porous filtration module communicate with each other.

As the filtration proceeds, the filtration module is provided with a backwashing means by an ultrasonic oscillator or a vibration generator to allow the attached solids to be detached by vibration because solids accumulate. The filtration module is repeatedly vibrated in a sequential manner. It is provided with a driving device for moving the backwashing means so as to apply, the sludge collector and the scum skimmer to remove the scum collected on the surface of the solid precipitated or sedimentation basin by the drive unit is driven together.

As such, due to the head difference between the effluent level of the water collecting means and the surface of the sedimentation basin, the filtration pressure is largely required in the structure in which the particles having a smaller particle diameter than the diameter of the micropores are filtered through the micropores formed in the porous filtration module. The application may be restricted for settling plants which are uneconomical and already installed and operating.

Thus, in order to supplement the problem of the porous filtration module that is mainly strained (straining), a fibrous filtration module was applied as the second filtration means according to the present invention. The fibrous filtration module forms a fibrous layer of fibrous woven or nonwoven fibers superimposed so as to distribute cotton, loofah, or many fibers in the ciliated form or the flow of water in a relatively large perforated tube or perforated plate. It constitutes a means. Therefore, microflocs and particles in the symbolic water in the process of moving the symbolic water in the upper part of the sedimentation basin are intercepted, impeded, sedimentated or attached by the fibers provided in the filtration module. Because of the removal, the head loss is less than that in the porous filtration module in which the solids are mainly sieved by the micropores formed in the filtration module.

The backwashing of the porous or ciliated filtration module can remove the attached solid layer by scraping or disturbing the surface, and can apply the brush backwashing means operated by the driving device or the backwashing means by the ultrasonic oscillator or vibration generator. have.

In addition, in order to increase the solids collection efficiency and to reduce the head head difference between the sedimentation basin surface and the outflow water level, the third filtration means according to the present invention suspending very large fibers near the surface of the sedimentation basin is a fibrous layer To be collected. That is, the filtration means is composed of cotton, loofah or a woven fabric, a nonwoven fabric, and a rope-shaped fiber having a cilia formed on the surface thereof suspended from the surface of the sedimentation basin.

As the microflocs continue to collect on the suspended fibers in the sedimentation basin, they grow into coarse flocs on the surface of the fiber, which are spontaneously detached from the fiber surface by the weight of the coarse floc and settle to the bottom of the sedimentation basin to be removed by the sludge collector. Since light solids having a specific gravity smaller than water in the coarse floc detached from the surface of the fiber float on the surface and are removed by the scum skimmer, the backwashing means can be omitted if the filter means are made of suspended fibers. Since the fibrous layer can be made wide throughout the surface of the sedimentation basin, the chance of fine floc or particles being collected by the fibrous layer is increased, so that the solid removal efficiency is more excellent in the fibrous filtration module.

In addition, in the present invention, a plurality of sheets or cotton with cilia formed on the surface of the microfloc and particles suspended in the supernatant water as a fourth filtration means to reduce the head difference between the surface of the sedimentation basin and the outflow water level. Fibrous plates, such as shape and loofah, were installed perpendicular to the water surface of the settling basin.

In particular, by installing the fibrous plate material inside the sedimentation basin but inclinedly installed the fibrous plate in order to add the sedimentation efficiency by the inclined plate, the inclined plate sedimentation basin can reduce the surface area of the sedimentation basin or increase the solids collection efficiency can do. In this case, a plurality of the inclined plates are installed at a predetermined interval so that a gap is formed between the inclined plates. The upper surface of the gap, that is, the lower surface of each inclined plate is formed of a ciliated layer or formed in the form of cotton, scrubber so that fine flocs and particles can be attached well. In addition, the microflocs are attached to and coarsened at the upper surface of each slanting plate, that is, the upper surface of each slanting plate, so that the solids settled after detachment slide well and slide down. It consists of dirty faces. Therefore, it is possible to realize the effect that the fine floc is attached to and removed from the fiber surface and the effect of increasing the precipitation efficiency by the inclined plate at the same time.

1 is a sedimentation basin equipped with a backwashing function and a porous filtration module as a first embodiment of the present invention.

Section,

Figure 2 is a sedimentation basin equipped with a backwash function and a fibrous filtration module as a second embodiment of the present invention

Section,

Figure 3 is a third embodiment of the sedimentation basin equipped with filtration means by the suspension fiber

Cross-section,

4 is a sedimentation basin equipped with a filtering means by a fibrous sheet as a fourth embodiment of the present invention.

Section,

5 is provided with a backwash function and a filtration module by compressed air as a fifth embodiment of the present invention.

Section of a precipitated sedimentation basin.

* Description of the symbols for the main parts of the drawings *

Reference Signs List 10 sedimentation basin 11: sludge discharge port 12: bottom surface 13: mixed liquid inlet pipe 14: sludge discharge pipe 21: porous filtration module

22: fibrous filtration module 23: suspended fibers

24: fibrous plate 30: catchment

31: collecting pipe 32: effluent control valve

33: expansion tube 41: ultrasonic or vibration oscillator

42 brush 43 vibration shielding means

50: solids spill prevention means 60: drive device

61: scum skimmer 62: sludge collector 63: rotary support shaft

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

1 is a schematic cross-sectional view of a sludge collector equipped with a backwashing function and a sedimentation basin equipped with a porous filtration module as a first embodiment of the present invention.

As shown in Fig. 1, the inside of the sedimentation basin 10 is partially submerged under the surface of the sedimentation basin, and the upper part is provided with a water collecting channel 30, which is a water collecting means in the form of a water channel exposed to the atmosphere. A plurality of inlets are perforated in the lower part of the water collecting channel, and the collecting channel is provided with filtration means including a porous filtration module 21 made of fibers, ceramics, or metals. Outlets of the module are installed to communicate with each other.

The backwashing means in this embodiment is an ultrasonic oscillator or vibration generator 41 which allows the solid matter attached to the filtration module to be detached by vibration, and repeatedly vibrates to the porous filtration module composed of a plurality of filtration modules. Sludge collector which is provided with a drive device 60 for moving the backwashing means so that the solid matter attached to the desorption means, the scum collector to remove the solids settled in the lower part of the sedimentation basin or the scum floated on the surface of the sedimentation basin ( 62 and the scum skimmer 61 are driven together. That is, the rotary support shaft 63 is driven by the drive device 60 in the center of the settling tank 10, the rotary support shaft 63, the scum skimmer to extend horizontally along the width direction of the settling tank ( 61 is connected, and a backwash means 41 is connected to the scum skimmer 61. Accordingly, when the driving device 60 is operated, the rotary support shaft 63 rotates while the backwashing means 21 pivots horizontally to sequentially contact the plurality of filtration modules 21 to backwash the filtration modules 21. .

In FIG. 1, reference numeral 11 denotes a sludge discharge port, 12 denotes a bottom surface of the sedimentation basin, 13 denotes a mixed liquid inlet pipe, and 14 denotes a sludge discharge pipe. Here, the vibration shielding means 43 made of a plate such as metal or synthetic resin in the lower portion of the backwashing means so that the vibration generated by the backwashing means disturbs the sludge blanket layer formed at the lower portion of the sedimentation basin to prevent the floating of solids. It is desirable to install it.

When the backwashing means is moved by the driving device and the vibration is applied to the filtration module, the solids detached from the filtration module may be discharged through the water collecting channel to turbid the treated water. Therefore, the solids discharge prevention means 50, such as a stopper, the gate form at the outlet of the filtration module is moved together with the backwashing means to temporarily seal the outlet of the filtration module to be backwashed is discharged along the treated water Can be prevented.

In this embodiment, floc and particles having a particle size smaller than the diameter of the micropores are removed by straining while the symbol water passes through the micropores formed in the filtration module due to the water head difference between the water level of the sump and the surface of the sedimentation basin. do. Since the filtration module of the structure filtered by the micropores requires a large filtration pressure, the application may be limited to the sedimentation basin already installed and operating.

FIG. 2 is a schematic cross-sectional view of a sedimentation basin equipped with a backwashing function and a ciliated filtration module according to a second embodiment of the present invention. In order to solve the problem of large water head difference between the surface of the sedimentation basin and the outflow water level in the first embodiment.

The fibrous filtration module 22 in this embodiment is coarsely woven so that cotton, loofah or cilia with a large number of cilia are circulated well in a perforated tube or perforated plate having a larger diameter than the micropores configured in the porous filtration module. Filtration means are formed by overlapping the woven or nonwoven fabrics to form a fibrous layer. Therefore, the fine flocs and particles in the symbolic water collide with and adhere to the fiber surface of the fibrous filtration module in the process of moving the symbolic water from the upper part of the sedimentation basin to the catchment, so that the solids are mainly sieved by the micropores formed in the porous filtration module. The head loss is less than in the first embodiment.

In this embodiment, the backwashing means in the form of a brush 42, which is detached from the surface of the fibrous filtration module by detaching and removing the attached solid layer and operated by the driving device 62, is illustrated. The backwashing means by the ultrasonic oscillator or the vibration generator can also be applied as described above, and the configuration and operation of the other devices are similar to those of the first embodiment, and thus detailed description thereof will be omitted.

3 is a schematic cross-sectional view of a sedimentation basin equipped with a filtration means by suspension fibers, which is a third embodiment of the present invention, to increase solids collection efficiency and to significantly reduce the head difference between the surface of the sedimentation basin and the outflow water level.

In this embodiment, the filtering means is composed of a fiber layer having a very large surface area so that the fine floc and particles in the symbolic water collide with the surface of the fiber to attach and remove. That is, the filtration means is composed of fibers such as cotton, loofah or cilia, nonwoven fabric, rope having a cilia layer formed on the surface thereof suspended from the surface of the sedimentation basin.

In this embodiment, it is also possible to apply a brush, ultrasonic oscillator or vibration generator to detach the attached solid material by scratching or vibrating the fiber layer as a backwashing means. However, in this embodiment, when the microflocs continue to be collected on the surface of the fibers suspended on the settling basin and grow into coarse flocs, they are detached from the surface of the fiber by the weight of the coarse floc and settled to the bottom of the settling basin to the sludge collector 62. Is removed. The light solids having a specific gravity smaller than water in the coarse floc detached from the surface of the fiber float on the water surface and are removed by the scum skimmer 61, so the backwashing means may be omitted in this embodiment.

In this embodiment, the head loss is less than that in the first embodiment, and since the fiber layer can be formed in the entire surface of the sedimentation basin, the chance of fine floc or particles colliding with and removed from the surface of the fiber increases. The solid collection efficiency is better than in the example.

4 is a schematic cross-sectional view of a sedimentation basin equipped with a filtration means by ciliated plate as a fourth embodiment of the present invention, which can significantly reduce the head difference between the surface of the sedimentation basin and the outflow water level, and the precipitation efficiency due to the inclined plate may also be added. It relates to an embodiment that can be.

The filtering means in this embodiment is characterized in that the surface of the sedimentation basin is composed of a plurality of sheet or cotton or scrubber-shaped fibrous plates having cilia formed on the surface of the microfloc and particles suspended in the symbolic water to impinge and adhere to the surface of the fiber. Installed on

In addition, by installing the fibrous plate inclined inside the sedimentation basin, it is possible to configure the inclined plate sedimentation basin can reduce the required area of the sedimentation basin or increase solids collection efficiency. In this case, a plurality of gaps are formed between the inclined plates as a plurality of the inclined plates are overlapped at regular intervals. The upper surface of the gap, that is, the lower surface of each inclined plate is composed of a ciliary layer or a cotton or loofah so that fine flocs and particles can be adhered well. In addition, the surface of the lower sloping plate of the gaps, that is, the upper surface of each sloping plate is composed of a smooth surface so that the fine floc is attached and coarse at the upper fiber surface so that the tally settled solids can slide well and move downward. Therefore, it is possible to realize the effect that the fine floc is attached to and removed from the fiber surface and the effect of increasing the precipitation efficiency by the inclined plate at the same time.

In this embodiment, the fine flocs continue to adhere to the fibrous surface of the fibrous plate installed in the upper part of the sedimentation basin, and when the attached floc grows into a coarse floc, it detaches itself from the surface of the fiber by gravity and is sedimented under the sedimentation basin. It is removed by the collector 62. Among the coarse flocs detached from the surface of the fiber, solids having a specific gravity smaller than water are lifted to the surface and removed by the scum skimmer 61, so the backwashing means may be omitted and the solids attached by scratching or vibrating the surface of the inclined plate. A backwashing means such as a brush, an ultrasonic oscillator, or a vibration generator to remove the desorption may be applied.

5 is a schematic cross-sectional view of a sedimentation basin having a porous or ciliated filtration module and backwashing means by compressed air, which is a fifth embodiment of the present invention, and relates to an embodiment in which backwashing can be completed in a short time.

As shown in Fig. 5, the sedimentation basin is provided with a collecting pipe 31, which is a collecting means having a circular or rectangular shape of a water canal, which is immersed under the surface of the water, and a plurality of inlets are perforated therein. The water collecting pipe is provided with filtration means composed of porous or ciliated filtration modules 21 and 22, and the outlet portion of the water collecting pipe is connected to the outside by the expansion pipe 33 so that the water collecting pipe can be lifted or settled. The inlet and the outlet of the filtration module is installed to communicate with each other.

The backwashing means in this embodiment is an air compressor (not shown) which allows the solid matter attached to the filtration module to be detached by the compressed air ejected in the opposite direction to the filtration direction. When backwashing is required, the effluent control valve 32 connected to the outlet of the collection pipe is sealed, and the filtration module and the collection pipe are lifted into the atmosphere outside the sedimentation basin to blow out compressed air in the opposite direction to the filtration module. The collecting pipe is configured to communicate with the discharge port of the air compressor so that the attached solid matter can be detached.

Since the outflow of the treated water is not possible while the filtration module is lifted and backwashed, the collection pipe and the filtration module are composed of two or more series, and each series of filtration modules are lifted on the water surface and the other filtration module is used while the backwash is performed. And it is preferable to the continuous treatment is made because the outflow of the treated water is possible in the collection pipe.

As described above, when the sedimentation basin equipped with the filtration means according to the present invention is used for solid-liquid separation of a liquid containing a solid, the following effects are expected.

① Effective solid-liquid separation is possible by applying to mixed liquid with high solids concentration.

② It also collects fine particles with poor sedimentation properties, so it has good solid removal efficiency.

③ It is economical because the head loss is small and no pressure pump is needed.

④ Since it does not waste clean water for backwashing, it is economical and the hydraulic load due to backwashing does not increase.

⑤ It can be easily applied to existing sedimentation basin without requiring separate site and structure for installing filter.

Claims (15)

The bottom surface 12 is inclined downward toward the center portion, and the sludge discharge port 11 is provided at the center portion of the bottom surface, and is installed along the upper side wall circumference to collect the symbol water from which the solids have been removed. And a mixed solution inlet tube 13 for introducing the solid suspension mixture into the sedimentary solids from the mixed solution introduced through the mixed solution inlet pipe 13 by sedimentation by gravity and removing the solids. In the sedimentation basin flowing out to the outside as treated water through the catchment canal (30), It is rotatably installed in the vertical direction at the center of the settling basin 10 is supported in parallel with the bottom surface to the rotation support shaft 63 is driven by the drive motor 60 is rotated by the drive motor 60 And a sludge collector 62 for collecting the solids settled on the bottom toward the sludge discharge port 11, The water collecting channel 30 is formed with a plurality of inlets communicating with the inside of the sedimentation tank at regular intervals, and are installed horizontally in filtration modules 21 and 22 to communicate with each inlet; The filtration module 21 and 22 extends horizontally from the upper end of the rotation support shaft 63 to the filtration module 21 and 22 while being interlocked with the rotation support shaft 63 by the driving motor 60. A sludge collector equipped with a backwashing function and a filtration means, characterized in that it further comprises backwashing means (41,42) for backwashing the filtration modules (21,22) by providing vibration to the intermittent. According to claim 1, wherein the filtering means is a sludge collector equipped with a backwashing function, characterized in that the porous filtration module consisting of fibers, ceramics or metal sedimentation basin is installed According to claim 1, wherein the filtration means is a sludge collector equipped with a backwashing function and the sedimentation basin is installed, characterized in that the cotton, scrubber, woven fabric, non-woven fabric or a fibrous filtration module having a cilia formed on the surface thereof. The method of claim 1, wherein the filtering means is a backwashing fiber, characterized in that the suspension fiber of the configuration so that the surface of the woven fabric, non-woven, rope-shaped fibers formed with cilia on the surface of the sedimentation basin overlapping a plurality of Sedimentation basin equipped with a sludge collector and filtration means The sludge collector and filtration of claim 1, wherein the filtration means comprises a plurality of cotton, scouring pad-like plates, or fibrous plate having a cilia formed on the surface thereof, on the water surface of the sedimentation basin. Sedimentation basin delete delete delete The method of claim 1, wherein the filtration means or the water collecting channel has a backwash function, characterized in that the valve or gate-type solids spill prevention means for preventing the solids desorbed by the backwashing means is discharged through the treated water. Sedimentation basin equipped with sludge collector and filtration means delete delete delete delete According to claim 1, wherein a scum skimmer for removing the scum floating on the surface of the sedimentation basin is provided, the scum skimmer and the sludge collector is connected with the backwashing means by the drive device is characterized in that the backwash function Sedimentation basin equipped with sludge collector and filtration means. The sludge collector and filtration means of claim 1, wherein the water collecting channel and the filtration module are alternately formed, and the filtration and backwashing are repeated , and the water collecting channel and the filtration module are configured in two or more series to enable continuous processing. Installed sedimentation basin