KR100667012B1 - Recirculation filter bed and filtration system for sewage disposal - Google Patents

Abstract

The present invention is configured to minimize the degree of the organic filter medium caught in the mesh of the rotation of the circulating circulation, while forcibly removing and collecting the organic material caught in the mesh of the filter, to significantly improve the filtration performance for sewage The present invention is to provide a filter rotary circulating sewage filtering device which greatly improves the operating efficiency of the rotary filter.

The present invention is composed of a sewage inlet pipe 10 for transferring the sewage, rotary circulation filter 20, the filter medium 30, the treated water collection tank 40, the filter medium / dirt mixing tank 50, the rotation circulation The first type collecting fan 23 is installed in the type filter 20 to receive the treated water falling in the upper orbiting area immediately below the upper orbiting area of the filter bed 21 and to discharge it directly to the treated water collecting tank 40. In addition, a high pressure sprayer 24 is installed in the upper portion of the lower track area of the filter bed 21 to remove the organic filter medium F and the dirt contained in the filter as high pressure sprayed washing water, and the lower track of the filter bed 21. Directly below the zone is a residue collection pan 25 for receiving the organic filter medium F removed from the filter bed 21 and the dirt and washing water by the high-pressure sprayer 24 and discharging it to the filter medium / dirt mixing tank 50. Is installed.

Sewage, dirt, filter, filter, rotary filter, organic filter, filter cloth

Description

Recirculation filter bed and filtration system for sewage disposal}             

Figure 1 shows a conventional transfer filtration organic wastewater treatment apparatus

Figure 2 is shown in one side cross-sectional view of the filter rotation circulation sewage filtering device according to an embodiment of the present invention

Figure 3 is a flow chart showing the sewage treatment process using a sewage filtration device according to the present invention

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<Description of Symbols for Main Parts of Drawings>

10: sewage inlet pipe 20: rotary circulation filter 21: filter

22: driving means 22a: driven roller 22b: driven roller

23: 1st collection pan 24: High pressure sprinkler 25: Residual collection pan

30: Media feeder 31: Hopper 31a: Inlet

31b: outlet 32: distribution means 40: treated water collection tank

50: media / dirt mixing tank 51: inclined surface F: organic media

The present invention is to filter the sewage by supplying the organic filter medium (작은, filter medium) having a small particle diameter as the wood waste on the rotating circulation filter, and separates and collects the treated water obtained by filtering the sewage and the organic media to which the soil is adsorbed It is designed to be recycled by recycling, and in particular, it is possible to minimize the amount of organic media caught in the mesh of the circulating circulation and to remove and collect the organic media caught in the mesh of the filter. It is about.

Recently, as urbanization progresses rapidly and the amount of water used in each household increases, sewage and sewage generated in large quantities have become a serious social problem.

Sewage and sewage refers to polluted water, which is different from wastewater containing most of the household sewage that is thrown away at home and containing harmful substances such as heavy metals and toxic substances accumulated in the human body. There are two ways to purify the wastewater: End of Treatment and Treatment in place.

The sewage terminal treatment method above establishes a sewage pipe from sewage treatment plant to sewage treatment plant, and has large facilities such as sedimentation tank, aeration tank, filtration tank, and treatment water storage tank in sewage treatment plant. Transfer has been processed.

This sewage terminal treatment method has to establish a pipe network, to install a sewage treatment plant of a large site, and to process the sewage through the complex sewage treatment plant step by step has come with the following problems.

First, the sewage terminal treatment method has a large facility site and a complex sewage treatment plant, not only enormous facility cost for constructing a sewer pipe system from the source to the sewage treatment plant, but also maintenance cost according to the operation of the sewage treatment plant. This excessively required, and as a result, there is a problem that the sewage and sewage can not be economically treated.

Second, the sewage terminal treatment method is required to treat even water that does not need to be treated because rainwater, etc. flows in, and wastes a lot of energy to operate this sewage treatment plant. There is a problem in that the sewage can not be treated and discharged to the river.

Third, in the sewage treatment plant that executes the sewage terminal treatment method, not only the treated water generated in a large quantity can be recycled, but also discharged to the stream as it is, and it is difficult to deal with a lot of waste (sludge) generated in the sewage treatment process. There is this.

Fourth, most of the sludge produced by the sewage treatment is aggregated in the form of cake and dumped into the sea (65%), landfill (25%), incineration (5%), and recycled (5%). Other methods, except recycling, cause secondary pollution, which is becoming a serious social problem. As an alternative, we try to compost and recycle sludge, but the sewage flowing into the sewage treatment plant also contains some industrial wastewater containing harmful substances. There is a problem that is difficult to compost.

On the other hand, clean technology (also called clean water treatment method or in-situ treatment method), in contrast to sewage terminal treatment, directly treats sewage in polluting sites such as apartment complexes, and converts the total amount of treated water into heavy water and landscaping water. It is possible to save water resources by recycling it into agricultural water, water for spraying water, ground water replenishing water, etc., and it has high energy saving effect in producing water resources, and it is economical because it does not need additional facilities such as small facilities and small network facilities. It is known that there is an advantage.

Developed in connection with the above-described pollution site treatment method, as shown in FIG. 1, Korean Unexamined Patent Application Publication No. 2001-109243 (Dec. 08, 2001) transfers the filter medium, and the organic wastewater and / or pretreatment as the filter medium. Transfer filter 100 for performing a filtration operation on the filtered filtrate, the filter medium supply means 200 for supplying the filter medium is applied to the surface of the transfer filter 100, and the transfer filter 100 as Organic wastewater supply means 300 for supplying organic wastewater on the filter medium during transport of the filter medium, the transfer filter 100 of the organic wastewater discharged below the mesh belt conveyor 110 for transporting the filter medium A transfer filtration organic wastewater treatment apparatus including a plurality of filtrate collecting means 120 for collecting the filtrate and resupplying it on a less contaminated filter medium is disclosed.

The transfer filtration organic wastewater treatment device is supplied to the mesh belt conveyor 110 of the transfer filtration unit 100 to contact the organic wastewater on the filter medium being transported and filtered, and the filtrate is treated in the previous step in the filtration process. The filtrate collected by the collecting means 120 is returned to a relatively less contaminated filter medium to be filtered again to increase the cleanliness of the filtrate discharged through the final step, and also to discharge the filtered medium and the solid component. Mixed fermentation with each other has the advantage of being used as a compost.

However, such a transfer filtration type organic wastewater treatment apparatus is provided with a filtrate collecting means 120 under the mesh belt conveyor 110 of the transfer filtration unit 100, the mesh belt conveyor 110 in the sewage filtration process Since the filtrate passing through the upper or lower region and the lower orbit region of the filtrate is collected by the filtrate collecting means 120, the filtrate is conveyed to the less contaminated filter medium, and the filtrate is filtered again. When passing through the upper and lower track regions of 110), a large amount of filter media such as sawdust or chaff having a small particle size is caught in the mesh of the mesh belt conveyor, and the adhesive component remaining in the filtrate surrounds the filter media. At the same time, microorganisms are proliferated and adhered to the mesh belt conveyor 110 to prevent thickening of the mesh, so that the filtration performance of organic wastewater is reduced or not In addition to the loss, there is a serious problem such as frequently causing a failure by disturbing the conveying operation of the mesh belt conveyor (110).

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The present invention is to minimize the degree of the organic filter medium caught in the mesh of the rotation of the circulating circulation, while at the same time configured to forcibly remove and collect the organic material caught in the filter mesh, significantly improving the filtration performance for the first sewage The purpose of the present invention is to provide a filter rotary circulating sewage filtering device, and a second object is to provide a filter rotary circulating sewage filter that greatly improves the operation efficiency of the rotary filter.

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The present invention for achieving the above object is a sewage inlet pipe 10 for transporting sewage; A rotary circulation filter (20) having a filter (21) installed to rotate in an orbit by the driving means (22) in the lower part of the sewage inflow pipe (10); A filter feeder (30) for supplying an organic filter medium (F) having a small particle size as wood waste on the filter bed (21) of the rotary circulation filter (20); A treated water collecting tank 40 for storing the treated water dropped by contact filtration of sewage introduced into the organic filter medium F supplied from the filter bed 21 of the rotary circulation filter 20; In terms of the filter medium / dirt mixing tank 50 for storing the organic filter medium (F) to freely fall in the state of adsorbing dirt in the filter bed 21 of the rotary circulation filter 20 is a conventional and technical concept Do it together.
However, as shown in Fig. 2, the filter rotary circulation sewage filtration apparatus of the present invention has a treatment in which the rotary filter 20 drops from the upper track region immediately below the upper track region of the filter 21. A primary collecting fan 23 is installed to receive water and discharges it directly into the treated water collecting tank 40, and an organic filter medium fitted into the filter as high pressure sprayed washing water is directly above the lower track area of the filter bed 21 ( F) and the high pressure water sprayer 24 is installed to remove the dirt, and the organic filter medium F and the dirt removed from the filter bed 21 by the high pressure water sprayer 24 under the lower track area of the filter bed 21. And a residue collection pan 25 to receive the washing water and discharge it to the filter medium / filtrate mixing tank 50.

As described above, the filter rotation circulating sewage filtering device of the present invention includes a primary collecting fan 23 before the treated water that is filtered and dropped through the sewage filtration process in the upper track area of the filter 21 that rotates and rotates passes through the lower track area. ) And directly discharged into the treated water collection tank 40, and when the filthy water is filtered in the upper trajectory region of the filter bed 21, the organic filter material F caught in the filter net is sprayed by the high pressure sprayer 24 at high pressure. Organic filter (F) and dirt and washing water removed from the mesh of the filter bed (21) are received in the residue collection pan (25) and discharged to the filter medium / filtrate mixing tank (50). ) To minimize the degree of pinching of the organic media (F) having a small particle size as wood waste in the mesh of the filter bed (21), and forcibly remove some organic media (F) caught in the mesh of the filter bed (21) by force It is to be collected.

Therefore, the present invention allows the mesh of the filter bed 21 to remain clean at all times without being blocked by the organic medium F and the adhesive component microorganisms contained in the sewage, thereby increasing the amount of sewage treatment per unit time and shortening the treatment time. In addition to making it possible, the image (21) has a merit such as to cause the failure to stop and smoothly rotate without rotation to increase the operation rate and reduce the maintenance cost.

Hereinafter, the technical configuration of the present invention will be described in detail with reference to the accompanying drawings in accordance with a preferred embodiment of the present invention.

The sewage inflow pipe 10 is connected to a flow regulating tank for collecting sewage generated in each household of the apartment house, and the organic media supplied to the filter 21 of the rotary circulation filter 20 for the sewage collected in the flow regulating tank. (F) It is installed to spray evenly over.

Rotating circulation filter 20 is a component that performs a key function in the present invention, is located in the bottom of the sewage inlet pipe 10 has a space on the inside by the drive means 22 has an upper and lower track area The filter image 21 may be installed to circulate while rotating along the caterpillar.

This rotary filter 20 is preferably made of a steel structure such as H-beams firmly installed in the skeleton.

In the upper track region of the filter bed 21, the filthy water flowing through the sewage inlet pipe 10 is filtered on the organic filter material F supplied from the filter medium feeder 30, and in the lower track area of the filter bed 21, The organic filter medium (F) which adsorbed the dirt in the sewage filtration process is freely dropped and discharged to the filter medium / filtrate mixing tank 50 side.

In addition, the filter image 21 is a filter cloth (mesh) having flexibility of metal or plastic material, and it is appropriate that the mesh eyes have a spacing of 2 mm or less.

The driving means 22 receives a driving force of a motor (not shown) and the main roller 22a rotates to move the image 21, and the image 21 has a space therein and an upper track area. It consists of a plurality of driven rollers 22b which are arranged to achieve an endless track having a lower and lower track area and rotated so that the image can travel, so that the image 21 can be rotated and rotated at a designed driving trajectory and speed. do.

Here, it is preferable that the filter 21 rotated and circulated by the driving means 22 is installed to travel at a speed of 100 to 300 m / day (100 to 300 m per day). If the running speed of the filter is 100m / day or less, the organic media is unnecessaryly consumed compared to the amount of treated water, thereby reducing the economic efficiency, and if the running speed of the filter is 300m / day or more, the filtration time is too short to properly remove the dirt. Considering this point, the filter 21 is preferably installed to run at a speed of 180m / day.

In addition, the rotary circulation filter 20 receives the treated water falling in the upper track area with the primary collecting fan 23 installed directly below the upper track area of the filter bed 21 and receives the treated water tank 40. The high pressure sprayer 24 installed at the upper portion of the lower raceway region of the filter bed 21 is used to filter the wastewater by injecting the washing water with high pressure from the inside to the outside of the filter bed. It is possible to remove the organic filter material (F) and dirt caught in the man's eye, and the residue collection fan 25 installed directly below the lower track area of the filter (21) to remove the man's eye of the filter (21) It is important to receive the organic filter medium (F) and the dirt and washing water to be discharged to the filter medium / dirt mixing tank (50).

The reason for this is to minimize the degree of pinching of the organic filter medium F having a small particle size as wood waste in the mesh of the filter bed 21, and forcibly removing some organic filter material F caught in the mesh of the filter bed 21 by force. By allowing the collection, the adhesive component included in the sewage is adhered to the organic filter medium F caught in the mesh of the filter 21 or the microorganisms are proliferated and do not occur in a thick state. To keep the blindfold of).

The filter medium feeder 30 is installed on one side of the filter bed 21 to supply organic filter material F having a small particle size as wood waste on the filter bed 21 before the sewage flows from the sewage inlet pipe 10. Play a role.

The filter medium feeder 30 has an inlet 31a for receiving the organic filter medium F from the outside and an outlet 31b for discharging the stored organic filter medium F to one side of the filter bed 21. Dispersion means 32 which is installed near the hopper 31 formed in the lower portion and the discharge port 31b of the hopper 31 and evenly sprays the organic filter medium F stored in the hopper 31 on the filter bed 21. In this case, the organic filter medium F is supplied on the filter bed 21 so that the organic filter material F can be installed in a uniform thickness.

The hopper 31 preferably has a volume capable of storing a daily usage level. For example, when the amount of treated water per day per filter device is 2,000 tons, the media storage volume of the hopper 31 is set to about 20 tons.

The distribution means 32 is for evenly spreading the organic filter medium F on the filter bed 21. When the organic filter medium F is sprayed with a thickness of 50 mm or less on the filter bed 21 by the distributing means 32, dirt cannot be properly filtered out, resulting in poor treatment water cleanness, and on the filter bed 21 by the dispensing means 32. When the organic filter medium F is sprayed to a thickness of 300 mm or more, the amount of organic filter material F is increased compared to the amount of treated water, thereby reducing economic efficiency. Thus, the distributing means 32 is disposed on the filter bed 21. ) Is preferably sprayed to have a thickness of 50 to 300 mm.

Organic filter medium (F) used in the present invention has a function of adsorbing the dirt contained in the sewage. This organic filter material (F) is used to crush wood waste and use a small particle size. The organic material (F) produced by processing wood waste is inferior in absorbing power than activated carbon, but is deposited on the filter bed (21) so that all the filtration in the surface layer is carried out. Because the action is made, there is no significant difference in the filtration capacity, there is an economic advantage compared to expensive activated carbon for filtration.

The organic medium (F) is preferably used by mixing the wood pieces crushed wood waste in various sizes in the range of 1 ~ 5㎜ thick, 5 ~ 25㎜ length at a predetermined assembly rate. At this time, the organic filter material F is designed to design the passage speed and the assembly rate of the sewage through experiments and to be installed at the designed thickness on the filter bed 21.

Here, the organic filter material (F) is put out to add a small amount of sawdust, fallen leaves, chaff and the like to the wood pieces processed under the above conditions it can be used to mix.

The treated water collection tank 40 is positioned at the bottom of the filter bed 21 and serves to temporarily store the filtered treated water by contacting the sewage with the organic filter medium F supplied on the filter bed 21 to temporarily store the filtered water.

The treated water collected in the treated water collection tank 40 is transferred to a separate advanced water treatment chamber (ultrafiltration membrane chamber) through a suction type vacuum pump installed at the bottom thereof, and is recycled into heavy water through a second advanced water treatment process.

The filter medium / filtrate mixing tank 50 is installed at the other lower portion of the lower track area of the filter bed 21 and has an organic filter material F falling in the state of adsorbing dirt in the lower track area, and the high pressure sprayer 24. The organic filter medium (F), which is removed from the mesh of the filter bed 21 and discharged through the residue collecting pan 25, receives dirt and washing water and temporarily stores it.

The capacity of the filter medium / filtrate mixing tank 50 is preferably about three times the capacity of the filter medium supply device 30, and the actual size should have a volume of 100 tons or more in consideration of the storage of the margin.

In addition, the filter medium / dirt mixing tank 50 forms a portion in which the organic filter medium (F) and dirt falls into the inclined surface 51, so that the organic filter medium (F) and the dirt flows through the inclined surface (51) to be evenly mixed.

That is, one surface of the cross section of the filter medium / filtrate mixing tank 50 is constructed to be inclined downward (approximately 60 °) at the end of the lower track area of the filter bed 21, and the material which can overcome the load and corrosion (eg For example, it is constructed using stainless or aluminum material.

The lower part of the filter medium / filtrate mixing tank 50 is constructed with a slope of 1/10, so that it is easy to carry out the whole amount during washing or taking out.

It is not necessary to install a separate machine in such a media / dirt mixing tank, it is also possible to install a mixture stirrer driven by a motor, depending on the situation, and to install an opening so that the food waste discharged from each home can be put in the upper portion.

In addition, at least two vent pipes are provided to discharge the gas generated from the inside.

The contents taken out in the filter medium / filtrate mixing tank 50 configured as described above are transferred to a separate digester through a suction vacuum pump to undergo aerobic composting or anaerobic digestion.

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Referring to the sewage treatment process using the filter rotation circulation sewage filter of the present invention carried out as described above are as follows.

As shown in FIGS. 2 and 3, the organic filter medium F is installed from the filter medium feeder 30 in the upper trajectory region of the filter bed 21 that is rotated and circulated by the driving means 22 of the rotary filter 20. Sewage (design standard living sewage BOD 200 ~ 300PPM or more) is supplied from the sewage inlet pipe 10 onto the organic filter medium F installed in the upper orbital region of the filter 21, and then strining. When the sewage comes into contact with organic media (F), which performs filtration such as interception, sedimentation, flocculati on, and adsorption, it passes through the contaminants contained in the sewage. It becomes the treated water (design target BOD 10-20PPM) more than% removed.

Subsequently, as the filter layer 21 continues to travel, the organic filter medium F is discharged to the filter medium / filtrate mixing tank 50 in the state of adsorbing the contaminants removed from the sewage, and the upper track area of the filter layer 21 is increased. The treated water filtered and dropped through the sewage filtration process is discharged directly to the treated water collecting tank 40 via the primary collecting fan 23 before passing through the lower track area.

At this time, when filtering the sewage in the upper trajectory area of the filter bed 21, the organic filter medium F and the dirt trapped in the filter net are removed by washing water sprayed by the high pressure sprayer 24, and the filter bed 21 is removed. Organic filter medium (F) and dirt and washing water removed from the blinds are discharged to the filter medium / dirt mixing tank 50 via the residue collection pan (25).

The filtered water collected in the treated water collection tank 40 through the primary water collecting fan 23 after being filtered in the filter bed 21 is transferred to a high water treatment chamber (secondary filtration facility, ultrafiltration membrane), and thus, a predetermined amount of water. The final treatment water becomes the final treatment water, and the final treatment water can be recycled to the whole heavy water.

On the other hand, the organic filter medium F falling in the state of adsorbing contaminants from the lower track area of the filter bed 21 and is removed from the mesh of the filter bed 21 and discharged through the residue collection fan 25. Organic filter media (F) and waste water and washing water are collected and mixed in the filter medium / filtrate mixing tank (50), and the mixture is transferred to a digestion tank, which is the next process, such as a vacuum car, to undergo aerobic composting or anaerobic digestion. After coarse well fermented compost can be recycled.

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As described above, the present invention minimizes the extent of the organic media having a small particle size as the wood waste in the filter mesh, and some organic media caught in the filter mesh can be forcibly removed and collected. By keeping the man's eyes clean at all times without being clogged by the organic media and the adhesive microorganisms contained in the sewage, the sewage throughput per unit time can be increased and the treatment time can be shortened. It is an invention having a useful effect such as to make the rotation cycle smoothly without stopping to increase the operation rate and to reduce the maintenance cost.

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Claims (11)

Sewage inlet pipe 10 for transporting effluent; A rotary circulation filter (20) having a filter (21) installed to rotate in an orbit by the driving means (22) in the lower part of the sewage inflow pipe (10); A filter feeder (30) for supplying an organic filter medium (F) having a small particle size as wood waste on the filter bed (21) of the rotary circulation filter (20); A treated water collecting tank 40 for storing the treated water dropped by contact filtration of sewage introduced into the organic filter medium F supplied from the filter bed 21 of the rotary circulation filter 20; In the filter medium / dirt mixing tank 50 for storing the organic filter medium (F) to freely drop in the state of adsorbing dirt in the filter bed 21 of the rotary circulation filter 20, The rotary circulation filter 20 receives the treated water falling in the upper orbital region directly below the upper orbital region of the filter bed 21 and discharges it directly to the treated water collecting tank 40 so as to discharge it directly to the treated water collecting tank 40. ), And a high pressure water sprayer 24 is installed in the upper portion of the lower track area of the filter bed 21 to remove the organic filter medium F and the dirt contained in the filter bed as high-pressure sprayed washing water. Immediately below the lower track area of the organic matter filter (F) and dirt and washing water removed from the filter bed 21 by the high-pressure sprinkler (24) to receive the residue to collect the filter medium / dirt mixing tank (50) The rotary filter circulating sewage filter, characterized in that by installing (25). According to claim 1, wherein the drive means 22 is a main roller 22a that rotates to move the image 21 receives the driving force of the motor, and the image 21 has a space in the upper track An image rotation circulating sewage filtering device, characterized by comprising a plurality of driven rollers 22b which are arranged to achieve an endless track having an area and a lower track area, and which rotate the image to travel. delete delete The filter rotation circulating sewage filter according to claim 1 or 2, wherein the filter (21) is installed to travel at a speed of 180 m / day. delete The filter according to claim 1, wherein the organic filter material F is used by mixing wood pieces crushed wood waste in various sizes in a range of 1 to 5 mm in thickness and 5 to 25 mm in length at a predetermined assembly rate. Rotary circulating sewage filter. delete The filter medium according to claim 1, wherein the filter medium feeder 30 has an inlet 31a formed thereon for receiving the organic filter medium F from the outside and discharges the stored organic filter medium F to one side of the filter bed 21. The hopper 31 is formed at the lower portion of the hopper 31 and the organic filter medium (F) stored in the hopper 31, which is installed near the outlet 31b of the hopper 31, is evenly sprayed on the filter bed 21. The image rotation rotary sewage filtration device, characterized in that consisting of a distribution means (32). 10. The filter according to claim 9, characterized in that the dispensing means (32) sprays the organic filter medium (F) on the filter bed (21) to a thickness of 50 to 300 mm. delete

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