JPH0537303U - High-rate separator that uses raw water as filter medium wash water - Google Patents

Abstract

(57) [Summary] [Purpose] To wash the filter medium with raw water using a balanced float type water collecting trough in a high rate separator. [Structure] A plurality of filtration chambers 1 ′ each of which divides one tank 1 by partition walls 2, a floating filter medium layer 4 arranged in each of the filtration chambers 1 ′, a filter medium support grating 3 for supporting the same, and a lower portion thereof. A backwash air pipe 5 installed, a sludge attractor 6 for collecting sludge accumulated on the bottom of the tank 1, a withdrawal sludge pump 8 for withdrawing this sludge, and a plurality of balance float type collections that can be moved up and down by telescopic bellows. It is equipped with a water gutter 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-rate separator, which is a solid-liquid separator for primary treatment of sewage wastewater.

[0002]

[Prior Art]

 FIG. 11 is a sectional view of a conventional high rate separator. In the figure. 1 is the whole tank, 20 is a partition for separating the raw water injection chamber and the filtration chamber, 30 is a floating filter medium layer, 40 is a filter medium supporting material for supporting the floating filter medium layer 30, and 50 is an air pipe for backwashing the filter medium layer 30. , 60 is an overflow of treated water, and 70 is accumulated sludge.

Next, the operation will be described. Raw water continuously flows into the injection chamber at the left end of the tank, and part of the sludge in the raw water precipitates there, while the raw water flows into the filtration chamber from the bottom of the injection chamber. The raw water that has flowed in becomes an upward flow, solid organic substances are removed from the floating filter medium layer 30, and the raw water is filtered and remains in the upper part of the filtration chamber. The accumulated treated water is discharged from the overflow port 60, and when the treated water is completely discharged, the backwashing air is sent from the backwashing air pipe 50 to backwash the floating filter medium layer 30, and This is a process in which the sludge 70 accumulated on the bottom is collected by a sludge valve or a scraper and discharged by a sludge drawing pump or the like.

[0004]

[Problems to be solved by the device]

 Since the conventional high-rate separator is configured as described above, there is a problem that the raw water flowing into the filtration chamber is not evenly distributed in the entire filtration chamber, and the load on one part of the filter medium is unevenly distributed. The time required for the process is a considerable part of the overall water flow treatment, and when backwashing water is also used, the additional equipment and the proportion of the backwashing process in the entire process are also large. There was a problem such as becoming. The present invention has been made to solve the above problems.The raw water is evenly supplied to the filtration chamber to improve the treatment capacity of the filter medium layer, and the filter medium backwashing process is intensively and rapidly treated. The purpose is to obtain a high-rate separator that uses the raw water that can be produced as filter medium washing water.

[0005]

[Means for Solving the Problems]

 The high-rate separator according to the present invention, which uses raw water as filter medium washing water, comprises a plurality of filtration chambers in which one tank is divided by partition walls, a filter medium layer arranged in each of the above-mentioned filtration chambers, and a support medium for each filter medium layer. Filter media support grating, a backwash air pipe for backwashing the filter media installed at the bottom of each filter media support grating, and a sludge attractor for collecting sludge accumulated on the bottom of the entire tank. It is equipped with a withdrawal sludge pump for withdrawing the sludge collected by the sludge attractor, and a water collecting trough that has a large number of water collecting holes in the upper part of each of the plurality of filtration chambers and is vertically adjustable.

[0006]

[Action]

 The high-rate separator using the raw water of the present invention as filter medium washing water has a plurality of filtration chambers in which one tank is divided by partition walls, and a large number of water collection holes at the top of each filtration chamber, which can be adjusted vertically. Since the water gutter is installed, the raw water can be evenly supplied to each filtration chamber and used as the filter medium washing water.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front cross-sectional view of a high rate separator using raw water as filter medium cleaning water, which is an embodiment of the present invention when a floating filter medium is used. In the figure, 1'is each filter chamber divided into a plurality, 2 is a partition wall separating each filter chamber 1 ', 4 is a floating filter medium installed in each of the plurality of divided filter chambers 1', 3 is each floating Support grating for the filter medium 4, 5 backwash air pipes installed under the filter medium support grating 3, 6 sludge attractors, and 7 for vertically movable water collection installed in each filtration chamber 1 ' The gutter 8 is a drawing sludge pump.

FIG. 2 is a plan view of a high rate separator using the raw water of the present invention as filter medium washing water. In the figure, 9 is a pit for discharging treated water from the water collecting trough 7, 10 is a drain valve, and 11 is a balance float of the water collecting trough 9. FIG. 3 is a side sectional view of the high-rate separator of the present invention, in which 12 is a telescopic bellows for vertically moving the water collecting trough 9, and 13 is a water collecting pipe for discharging treated water.

FIG. 4 is a plan view of a balanced float type water collecting trough in the high rate separator of the present invention. In the figure, 14 is a balance float that holds the water collecting trough 7 on the treated water surface. FIG. 5 is a side view of a balanced float type water collecting trough in the high rate separator of the present invention. Reference numeral 15 in the figure denotes a plurality of treated water collecting holes which are opened on the left and right side surfaces of the main body of the collecting gutter 7 by punching with 10φ.

FIG. 6 is a front view of a balanced float type water collecting trough in the high rate separator according to the present invention in a stretched bellows extended state. In the figure, 16 is a stopper that sets the upper limit of the water collecting gutter 7 that can move up and down, 17 is a bellows support that supports an expandable bellows 12 that moves the water collecting gutter 7 up and down, and 18 is an extended state of the bellows 12. The treated water surface as WL1 at the time is shown. FIG. 7 is a front view of the balanced float type water collecting trough in the high rate separator of the present invention when the expansion bellows is in a contracted state. Reference numeral 19 in the figure denotes the treated water surface WL2 when the expandable bellows 12 is in a contracted state.

Next, the operation will be described. Raw water is continuously injected from the upper part of the raw water injection chamber at the left end of tank 1 in FIG. 1, and the injected raw water flows into the filtration chamber through the lower part of the injection chamber while precipitating some sludge on the bottom of tank 1. The raw water that has flowed in becomes an upward flow and flows into each filtration chamber 1 ′ divided by the partition wall 2. The lower part of the partition wall 2 is opened at the bottom of the tank 1 to be common, and the upper part is divided into full spaces, so it is regarded as a group of divided small tanks, and the inflow amount of the raw water is equalized accordingly. Can be measured.

The raw water that has flowed into each of the filtration chambers 1 ′ has its solid organic matter removed in each of the filter media tanks 4, is filtered, becomes treated water, stays upward, and is discharged from the water collecting trough 7. However, the water collecting gutter is a balance float type gutter as shown in FIG. 4 or a balance float 14 connected to the front end and the opposite end of the gutter body 7 that moves up and down by a cylinder drive. The water is retained on the treated water surface by a large number of 10φ water collection holes 15 opened on the side surface as shown in FIG. 5, and also serves as solid matter filtration. It is adjusted by the vertical movement of the telescopic bellows 12 attached to the lower part of the.

The operation of adjusting the amount of collected water is when the expansion bellows is extended in the state shown in FIG. 6, and the upper part of the water collecting gutter 7 is suppressed by the stopper 16 so as not to project, and the lower part is A telescopic bellows 12 is attached and further held by a bellows support 17. When the treated water surface reaches WL-1-18 in this state, water collection is started from the water collection hole 15.

Therefore, when the treated water stays in the upper part of each filtration chamber 1 ′, finally the water level adjustment of each filtration chamber 1 ′ is completely equalized by adjusting the water collection amount of the water collecting trough 7. The water level can be adjusted. The treated water thus treated is collected by each water collecting trough 7, passes through the discharge pipe 13 shown in FIG. 3, is collected in the pit 9 shown in FIG. 2, and is discharged from the valve 10 to the next treatment stage. Be touched.

Next, in the backwashing step of the filter medium, the filtration chambers 1 ′ are supplied to the respective backwashing air pipes 5 by backwashing one tank to each filtration chamber 1 ′ without stopping the filtration process. Since only the water collecting trough 7 of the above is forcedly moved down to lower the level of the water collecting hole as compared with other filtration chambers as shown in Fig. 7, all the raw water to be injected enters the corresponding filtration chamber 1 '. The filter medium is backwashed with a stream of raw water.

As described above, since the backwashing air pipe and the raw water flow backwash the filter medium, it is possible to quickly and effectively backwash the filter medium. Then, the sludge accumulated on the bottom of the tank 1 is scraped by the sludge scraper 6 and discharged to the outside of the tank 1 by the drawing sludge pump 8.

Another embodiment of the present invention will be described with reference to the drawings.

FIG. 8 is a plan view of a filter device using the raw water of another embodiment of the present invention as filter medium washing water. FIG. 9 is an explanatory view of another embodiment of the present invention during the whole tank filtration. FIG. 10 is an explanatory view when one tank of another embodiment of the present invention is being backwashed.

In the previous example, the case of a high rate separator using a floating filter medium having a specific gravity of 1 or less was described, but as another example, a filter medium having a specific gravity of 1 or more (eg sand filtration) is used. The case where it is used is explained. As shown in FIG. 9, raw water is injected from the raw water injection chamber at the left end of the tank 1, and the raw water flows upward from the lower part of the injection chamber into each filtration chamber 1 ′ divided by a plurality of partition walls 2. It

The raw water that has flowed in here is filtered in a filter medium tank 4 that uses a filter medium having a specific gravity of 1 or more, such as sand supported by a filter medium support material 3, and the treated water stays in the upper part of the filter chamber and is filtered by each filter. From the water collecting gutters 7 arranged one by one in the chamber 1 ', the water level is adjusted evenly in each filtration chamber 1'by collecting water as treated water while adjusting the water level, and the water collecting pipe 13 and the pit 9 shown in FIG. Through the valve opening 10 to the next stage.

Next, as shown in FIG. 10, when backwashing the filter medium layer 4 of a certain filtration chamber 1 ′ (the second filtration chamber in the figure), the water collecting gutter 7 is forcibly moved down to a large amount from both sides of the upper end. The treated water is pumped in to strengthen the upward flow of raw water, and the filter medium in the second filtration chamber is backwashed with raw water. As described above, the backwashing can be performed only in each divided tank of each filtration chamber 1 ', and the backwashing step can be performed by using raw water.

[0023]

[Effect of the device]

 In this device, the treatment tank is divided into multiple filtration chambers by partition walls, and each collection chamber is equipped with a water collection gutter that can be moved up and down, so that uniform injection adjustment of raw water and backwashing of filter media using raw water are performed. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a front sectional view of a high rate separator using raw water as filter medium washing water according to an embodiment of the present invention.

FIG. 2 is a plan view of a high rate separator using raw water as filter medium washing water according to an embodiment of the present invention.

FIG. 3 is a side sectional view of a high rate separator using raw water as filter medium washing water according to an embodiment of the present invention.

FIG. 4 is a plan view of the balance float type water collecting trough of the present invention.

FIG. 5 is a side view of the balance float type water collecting trough of the present invention.

FIG. 6 is an expansion state view of the telescopic bellows of the balance float type water collecting trough of the present invention.

FIG. 7 is a contracted state view of the telescopic bellows of the balance float type water collecting trough of the present invention.

FIG. 8 is a plan view of another embodiment of the present invention, a sand filter using raw water as filter medium washing water.

FIG. 9 is an explanatory view during the whole tank filtration of the sand filter device using the raw water as the filter medium washing water according to another embodiment of the present invention.

FIG. 10 is an explanatory view during backwashing of one tank of a sand filter device using raw water as filter medium washing water according to another embodiment of the present invention.

FIG. 11 is a cross-sectional view of a conventional high rate separator.

[Explanation of symbols]

 1 Tank 1'Filtration Chamber 2 Partition 3 Filter Media Support Grating 4 Filter Media Layer 5 Backwash Air Pipe 6 Sludge Scrubber 7 Water Collection Trough 8 Extraction Sludge Pump

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B01D 29/88 24/46 36/04 6953-4D 7824-4D B01D 23/24 A 8925-4D 29 / 08 Z

Claims (1)

[Scope of utility model registration request] 1. A plurality of filtration chambers in which one tank is divided by partition walls, a filter medium layer disposed in each of the filtration chambers, a filter medium support grating for supporting each of the filter medium layers, and a lower portion of each of the filter medium support gratings. The backwash air pipes for backwashing the filter media, the sludge attractor for collecting the sludge accumulated on the bottom of the whole tank, and the withdrawal for extracting the sludge collected by the sludge attractor. A sludge pump,
A high-rate separator using raw water as filter medium washing water, which comprises a plurality of water collecting troughs having a large number of water collecting holes at the upper part of each of the plurality of filtration chambers and which can be vertically adjusted.