KR200242570Y1 - Filter for treatment of wastewater - Google Patents

Abstract

The present invention relates to an upflow wastewater treatment filter, and more specifically, an upflow wastewater treatment which can simultaneously perform coagulation sedimentation and filtration inside the filter to effectively and economically filter insoluble suspended solids dissolved in water. For the purpose of providing a water filter, a raw water inlet pipe is provided at a predetermined height of a cylindrical tube filter, and has a blocking membrane and an inclined plate at a lower side of the raw water outlet, and a scraper and a sediment outlet which are rotatable by a motor inside the inclined plate. In addition, by having a filter layer on the upper side of the filter body that can be rotated and vertically flown by a motor, a coagulant is introduced into the filter to achieve coagulation sedimentation on the lower side of the filter, and is not aggregated by the filter layer provided on the upper side. To effectively capture the floating suspended solids It was, and the backwashing process definition is removed to provide for the waste water which enables the continuous operation processing filter.

Description

FILTER FOR TREATMENT OF WASTEWATER}

The present invention relates to a wastewater treatment filter, and more particularly, to an upflow filter that can effectively and economically filter insoluble suspended solids dissolved in water.

As the industrial society developed, water became an indispensable element for the continuation of industrial development and human life. Therefore, the population was concentrated around the river to form large and small cities. Although the industrial society is expanding and the urban concentration of the population is prominent, the pollution is intensified due to the lack of social indirect capital investment, and the discharge of suspended solids into rivers or rivers, especially at the bottom of rivers or rivers. Solids accumulate and decay, and as a result, secondary pollutants such as nitrogen and phosphorus are generated and cause eutrophication, and the progress of eutrophication of rivers and rivers is emerging as a big social problem. Accordingly, various methods of filtration of suspended solids contained in wastewater, which causes eutrophication, have been developed. In general, downflow filtration and upflow filtration are used.

In the conventional example, the downflow filtration method primarily flows raw water from the top of the filtration layer in a filtration chamber in which a filtration layer is formed by using sand or anthracite as a material in a filter in a sedimentation basin. This is to filter the suspended solids, and the suspended solids are collected by allowing the washing water supplied by the pump to pass through the filter layer at the bottom of the filter layer in order to solve the phenomenon that the filter layer is blocked due to the excessive collection of the suspended solids. A backwash process is needed to remove the solids.

However, the downflow filtration method is used to separate the process of sedimentation and filtration because it is impossible to treat with a single filter when treating wastewater containing a high concentration of solids, which is large and expensive to install. In addition, the backwashing process for cleaning the filtration layer has a problem in that it causes time loss and material waste because the filtration operation must be stopped and carried out.

In another conventional example, the upflow filtration method forms a filtration layer inside the filtration chamber and raises the raw water to a uniform distribution on the lower side of the filtration layer to achieve filtration, and for cleaning the filtration layer collecting solids. The air flowing into the lower part of the filtration layer through the pipe by the pump pushed up the filter medium to be washed by the filtered water flowing upward, so that the filtration and the washing could be performed at the same time.

However, the upflow filtration method described above is the same as the backwashing in the downflow, so when the inlet pressure is increased to increase the cleaning effect, the solids do not pass through the cracks in the filtration layer and lose their filtration capacity. Low-volume filtration is possible, but rapid filtration and large-scale filtration are impossible.

In order to improve the upflow filtration method, the raw water should be flowed downward and the filter medium can be washed by the filtered water by raising the filter medium in the lower part of the filtration layer through the pipeline by the suction force of the pump. And there is a problem that takes a lot of time when a large amount of filtration treatment.

The main challenge of the method for removing suspended solids in wastewater is how much filtration of suspended solids can be carried out in a short time. In order to satisfy these conditions, continuous operation should be possible without time loss such as backwashing, and the structure should not be cracked or destroyed in the filter layer. something to do.

Accordingly, the present invention was created to solve the problems of the conventional downflow filtration method and the upflow filtration method as described above, and more preferably to allow the filtration of suspended solids dissolved in wastewater. When the incoming raw water is introduced into the filter, the flocculant is directly added to cause the flocculation reaction with the suspended solids at the lower side of the filter to achieve flocculation sedimentation. The upper side is provided with a filter layer to effectively collect the floating solids without flocculation. The filter media can be cleaned automatically by performing rotation and up and down reciprocating motions to extend the service life of the filter media and at the same time as a replaceable means, so that coagulation sedimentation and filtration can be performed simultaneously in the filter. The process of backwashing has been eliminated and continuous operation is possible. To provide a high capacity and for the waste water treatment filter high-speed filtering process it is an object.

1 is a configuration diagram schematically showing a filtration method of a downflow filter according to a conventional embodiment.

2 is a block diagram showing an upflow filter according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1 filter 11 raw water outlet

12 slope plate 14 blocking film

15: discharge valve 21: scraper

31: Media layer 32: Media layer

40: filtered water outlet

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

1 is a configuration diagram schematically showing a filtration method of a downflow filter according to a conventional embodiment. In the operation of the downflow filter, raw water is introduced from the raw water inlet pipe 100, which is a wastewater inflow pipe, collected into the sedimentation basin 101, and a flocculant is introduced into the sedimentation basin 101 to coagulate the suspended solids contained in the raw water. Sediment is caused to accumulate to the bottom of the sedimentation basin (101). The elevated sedimentation water in the sedimentation basin 101 is moved to the filtration chamber 111 by the sedimentation water pump 110, and the sedimentation water is filtered by the filtration layer 112 provided in the filtration chamber 111 and filtered water. It is discharged to an appropriate place through the discharge pipe (120).

As the filtration layer 112 continues to operate, the flocculant suspended solids in the sedimentation basin 101 are continuously collected and the filtration function is lost as the collection amount is increased. Although required, the configuration of the filtration layer 112 is made of sand or anthracite, etc., which is difficult to replace in practice. Therefore, the washing water inlet pipe 114 is provided at the lower end of the filtration chamber 111 to control the three-way cock valve 115 to block the washing water inlet pipe 114 during the filtration operation, and to clean the filtration layer 112. The three-way cock valve 115 is controlled such that the filtered water discharge pipe 120 is blocked, and the washing pump 113 is operated to pressurize the washing water to raise the high pressure from the lower end of the filtration layer 112 to backwash. have.

However, the conventional downflow filtration method as described above requires a large installation space because the sedimentation basin and the filtration chamber are separated from each other, and the filtration operation cannot be performed during the time of backwashing, and the washing water is backwashed. The pump 113 needs to be pressurized with a high pressure from the pump 113, so a large power pump is required.

2 is a block diagram showing an upflow filter according to an embodiment of the present invention. The present invention solves the problems occurring in the conventional downflow filtration method shown in FIG. 1 and is a more advanced filtration method. The filter 1 is formed of a cylindrical tube and a third point from the bottom of the filter 1. Raw water inlet pipe 10 is provided on one side of the waste water is introduced, the raw water introduced through the raw water inlet pipe 10 forms a raw water discharge port 11 discharged downward of the filter 1, the filter (1) Between the bottom of the) and the raw water discharge port 11 is provided with an inclined plate 12 to guide the suspended solids contained in the raw water to flocculate the coagulant and the precipitate naturally, the precipitate induced by the inclined plate 12 is a precipitate It is accumulated in the accumulation chamber 13, the lower one side of the sediment accumulation chamber 13 is provided with a sediment discharge port 16 having a discharge valve 15, the accumulated sediment is outside the filter when the discharge valve 15 is opened. Can be discharged into have.

Since the precipitates in which the suspended solids coagulate and react with the flocculant are solid, they may not be discharged through the sediment discharge port 16 or may be fixed to the inclined plate 12. The scraper 21 is provided inside the inclined plate 12, and a scraper shaft 22 is provided at the center of the scraper 21 to be rotatable by the scraper motor 23. A plurality of blocking films 14 are installed on the top of the scraper 21 to partially block the rise of the relatively low specific gravity by the rotation of the).

In addition, in order to effectively filter the inside of the filter (1) without flocculation reaction with flocculating agent and floating floating solids, the upper side of the filter (1) is provided with a layered media layer 31 (1000 mm) layered on the upper side of the filter (1) The solids can be completely removed, and the material forming the media layer 31 uses an aggregate of pumice grains, which is a natural material having a very low specific gravity. The filter media layer 31 has a very rough surface and a sharp angle to further increase the filtration effect. Since the specific gravity is very low, the filter media has a narrow filter media void when the pressure in the filter 1 rises. The efficiency is even higher. If the filter medium layer 31 also continues to be used, the amount of suspended solids collected in the gap of the filter medium increases, and thus the filtering function is lost. Therefore, the filter medium layer 31 needs to be cleaned, and the container containing the filter medium of the filter medium layer 31 becomes a cartridge type, and the filter medium shaft 32 having a screw thread in the center thereof becomes upward, 32 is connected to the filter motor 33, the filter layer 31 is rotated by the operation of the filter motor 33 to move up and down to enable the cleaning of the filter layer 31 automatically. The cleaning by the rotation and vertical movement of the filter media layer 31 can significantly delay the replacement time of the filter media layer 31, and the filter media forming the filter media layer 31 is a cartridge type stored in a container, so the filter media layer 31 is Can also be easily replaced. At this time, it is preferable that the area of the filter medium layer 31 covers all of the area of the filter 1 possible.

As described above, the filtrate from which the suspended solids are completely removed by the upstream filtration of the filter medium layer 31 is discharged to an appropriate place through the filter water discharge port 40 located above the filter medium layer 31.

As described above, in the method for filtering wastewater suspended solids according to the present invention, the sedimentation basin and the filtration chamber are not separated from each other, so that coagulation sedimentation and filtration can be simultaneously performed in the filter, thereby minimizing the installation area of the filtration device, thereby reducing installation cost and construction. This simplifies the filter layer, allowing the filter layer to move up and down without the need for back-cleaning of the filter layer, thus enabling automatic cleaning to prevent time loss and material waste due to cleaning, and to allow continuous operation without interruption of the filtration operation. As a result, the filtration efficiency is greatly improved, and it is a very useful design that enables a large-capacity filtration capacity and a high-speed filtration treatment.

Claims (3)

In the upflow filter, Place the filter bed on the upper side of the raw water inlet to filter the wastewater flowing upward and discharge it through the filtered water outlet, Place a plurality of barriers at regular intervals in the lower side of the raw water inlet, A well-known rotatable scraper and an inclined plate are formed under the blocking film, The wastewater treatment filter, characterized in that for flowing out the sediment aggregated from the bottom of the inclined plate through a discharge valve. The method according to claim 1, The filter medium is a filter for wastewater treatment, characterized in that the rotation by the motor to enable the vertical operation. The method according to claim 1 or 2, The filter layer for wastewater treatment, characterized in that the aggregate of pumice grains is integrated.