KR101813528B1

KR101813528B1 - Sewage Wastewater for the screen device

Info

Publication number: KR101813528B1
Application number: KR1020150191366A
Authority: KR
Inventors: 윤영내; 최영익; 서민성; 이슬기; 이현규
Original assignee: 주식회사 에싸
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2017-12-29
Also published as: KR20170080131A

Abstract

The present invention relates to a screen device for a wastewater which can maximize the efficiency of foreign matter filtration and thereby make it possible to miniaturize the volume and to automatically clean the screen screen.
A screen device for wastewater according to the present invention includes an inlet portion 11 through which filtered water flows, an outlet portion 13 through which filtered water flows out, a mounting plate 12 provided with a screen net 30 and a blower 20, A screen box 10 installed to be immersed in the treatment tank into which the raw water flows and spraying the compressed air to the screen panel 30 to remove foreign substances adhered to the screen panel 30; (20), an inlet (11) of the screen box (10), a screen net (30) which surrounds the screen (10) and filters the foreign substances contained in the inflow water through microvoids, And a fixing bracket 40 for fixing the mounting plate 12 on the upper surface of the mounting plate 12.
According to the present invention, it is possible to improve the wastewater treatment efficiency of the wastewater treatment device due to excellent filtration performance, and to automatically perform cleaning of the screen screen by the bubbles ejected from the wide screen installed in the screen screen, So that the filtration performance can be stably maintained, and the labor and cost due to the maintenance can be reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to screen devices for wastewater,

The present invention relates to a screen device for wastewater, and more particularly, to a screen device for wastewater that maximizes the efficiency of foreign matter filtration, thereby making it possible to miniaturize the volume of the screen, and to automatically clean the screen screen to improve sewage treatment efficiency, To a screen device for a wastewater which can reduce manpower and costs by improving the quality of the wastewater.

In general, a sewage treatment apparatus is a device for purifying sewage and wastewater by filtering biological matters or physical processes such as dissolved pollutants, microorganisms and suspended substances contained in sewage and wastewater, and filtering them.

Such a wastewater treatment apparatus is provided with a filtration screen for separating and removing foreign matter such as various domestic wastewater and industrial wastewater, livestock wastewater, and high concentration organic wastewater, that is, various suspended m substances, solid substances, impurities contained in raw wastewater, Respectively.

The filtration screen includes a sieve screen, a drum screen composed only of a wedge wire, a drum screen using a mesh screen network, and the like, And the like.

The filtration screen filters foreign matters such as various suspended solids, solid substances, and contaminants contained in the raw water introduced into the wastewater treatment apparatus in order to easily purify the raw wastewater and the wastewater in the respective reaction tanks with the treated water in a clean state .

The above-described filtration screen for sewage treatment has been proposed in various forms, and representative conventional technologies will be described as follows.

As shown in FIG. 6, the registration type utility model publication 20-0406003 includes a square frame having a plurality of support bars bolted to each other, a drum installed in the frame to discharge the raw water into each reaction tank, A drum screen portion rotatably installed in the outer surface of the screen for filtering out foreign substances contained in the raw water, and a raw water inlet installed in the drum screen portion for introducing raw water into the drum screen portion, A drum rotating unit coupled to the frame outside the drum screen unit to rotate the drum screen unit; a nozzle unit rotatably coupled to the drum screen unit to spray raw water into the drum screen unit; The drum-type display device according to claim 1, A raw water pumping part for sending the raw water in the drum screen part to the nozzle part and for bypassing the raw water into the drum screen external part; and a raw water pumping part for being connected to one side of the frame to remove foreign substances in the drum screen part, And a sludge discharge unit for discharging the sludge discharged from the sludge discharge unit.

Registration Utility Model Bulletin No. 20-0406003 (2006. 01. 11.) Registration Utility Model Bulletin No. 20-0444922 (Jun. 16, 2009) Registration Utility Model No. 20-0447471 (2010. 01. 25.)

In the filtration screen of the prior art as described above, since the screen net of the mesh type is used, the introduced raw water passes through the drum screen, and the dissolved contaminants contained in the raw water, various kinds of foreign substances such as microorganisms, floating substances, (Denitrification, denitrification) of removing nitrogen and phosphorus components contained in the filtered water after passing through the pores of the screen net and being sent to the respective reaction vessels by filtering only the filtered water whose foreign substances have been removed by the screen net having a void smaller than the foreign matter. And the subsequent process of removing the organic matter contained in the filtrate water.

However, when the drum screen is used for a long period of time, there is a problem that a clogging phenomenon occurs in which the pores of the screen screen are clogged as the amount of foreign substances in the screen screen increases.

In particular, since foreign substances such as phosphorus-enriched sludge are less dense than sludge, and the sludge size is small and not uniform, a screen mesh having micropores is required to filter the phosphorus sludge. When such a screen mesh having micropores is used Various kinds of foreign substances stick to the screen net more easily, and the gap is closed so that the function of the drum screen does not work properly.

Therefore, the screen network of the related art has to be frequently replaced and cleaned, so that it takes much time for replacement and cleaning, so that the work efficiency is lowered. In addition, when the screen net is cleaned, It is troublesome and inconvenient to remove various foreign matters adhering to the screen net, and there is a problem that manpower and cost are increased, and there is also a problem that the sewage treatment efficiency is lowered due to the stoppage of the wastewater treatment device.

In addition, in the prior art, the filtration method in which the raw water introduced through the raw water discharging portion located at the central portion of the drum screen is subjected to the natural dropping treatment is relatively small so that the filtration area (about 1/8 of the total area of the drum screen) In order to increase the capacity, the drum screen must be relatively large, which makes it difficult to miniaturize the wastewater treatment device.

Accordingly, there is an urgent need to develop a screen device for wastewater that can improve the efficiency of the wastewater treatment, which is a drawback of the prior art, and facilitate the cleaning of the screen net to improve the usability of the wastewater.

The screen apparatus for wastewater according to the present invention is a screen apparatus for wastewater which has a box shape having an inner space and is provided at one side thereof with an inflow section 11 And an outlet 13 for discharging filtered water is formed on the other side of the screen 11 and a mounting plate 12 is formed around the inlet 11 so as to be immersed in a treatment tank into which raw water flows, (10);

(20) provided on the mounting plate (12) and having a pore (21) for spraying compressed air supplied through an air pump (not shown);

A screen net 30 for enclosing the inlet 11 of the screen box 10 and the blowhole 20 and filtering the foreign substances contained in the inflow water through microvoids;

A fixing bracket 40 detachably coupled to the upper surface of the mounting plate 12 so that the opening 31 of the screen net 30 can be closely fixed to the upper surface of the mounting plate 12 of the screen box 10, So as to maximize the efficiency of foreign matter filtration and miniaturize the volume, and to automatically clean the screen screen, thereby improving usability and sewage treatment efficiency, and reducing the manpower and cost Purpose can be achieved.

The screen apparatus for wastewater according to the present invention has a screening net having micro voids and has excellent filtration performance by filtering not only various kinds of foreign substances such as dissolved pollutants, microorganisms, suspended substances and impurities, but also phosphorus concentrated sludge There is an effect that the wastewater treatment efficiency of the wastewater treatment device can be improved.

In addition, it is possible to maintain the filtration performance of the screen network stably by preventing the clogging of the screen network by automatically removing the foreign substances accumulated in the screen network by using the bubbles ejected from the blower installed in the screen network, There is also an effect of reducing the cost.

In addition, it is possible to miniaturize the volume of the wastewater treatment device by making it possible to miniaturize the volume through the excellent filtration efficiency, and in addition, when the wastewater treatment device is used in a small scale wastewater treatment device, By the drawing process by being transported to the lower stream, it is possible to protect the pump, separation membrane device, and the like used in the wastewater treatment facility and extend the service life.

1 is a perspective view of an embodiment of a screen device for wastewater according to the present invention.
2 is an exploded perspective view of an embodiment of the screen device for wastewater according to the present invention.
3 is a perspective view of a screen net according to an embodiment of the screen device for wastewater of the present invention.
4 is a front cross-sectional view of an embodiment of the screen device for wastewater according to the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a screen apparatus for wastewater.
6 is an exemplary view showing a prior art relating to a filtration screen device for sewage treatment;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the construction and operation of a screen device for wastewater according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

A screen device for wastewater according to the present invention includes an inlet portion 11 through which filtered water flows, an outlet portion 13 through which filtered water flows out, a mounting plate 12 provided with a screen net 30 and a blower 20, A screen box 10 installed to be immersed in the treatment tank into which the raw water flows and spraying the compressed air to the screen panel 30 to remove foreign substances adhered to the screen panel 30; (20), an inlet (11) of the screen box (10), a screen net (30) which surrounds the screen (10) and filters the foreign substances contained in the inflow water through microvoids, And a fixing bracket 40 for fixing the mounting plate 12 on the upper surface of the mounting plate 12.

The screen box 10 has a rectangular box shape having an inner space and has an inlet 11 through which the filtered water filtered by the screen net 30 is formed at one side and an outlet 13 through which the filtered water is discharged to the other side. And an installation plate 12 is formed around the inflow part 11 so as to be immersed in a treatment tank into which raw water flows.

The installation plate 12 is provided with the blowing unit 20 so that the inflow unit 11 and the blowing unit 20 are enclosed together by the screening net 30 so that the screen box 10 is immersed The raw water flowing into the treatment tank is filtered through the screen net 30 so that the filtered water filtered through the inlet 11 having the porous structure is introduced and then discharged through the outlet 13 connected to the next treatment tank. Is supplied to the next treatment tank.

In order to prevent the inside of the screen box 10 from being blocked while the screen net 30 is introduced into the screen box 10 through the inflow part 11 by the flow of the raw water in the filtration process of the raw water, (11) preferably has a porous structure in which a plurality of small-diameter inlet ports (11a) are arranged at regular intervals.

The inflow section 11 is formed in a bilaterally symmetrical structure on both sides of the top of the screen box 10 so that the width of each inflow section 11 is provided for each inflow section 11, It is expected that the filtration efficiency of the raw water can be further improved by providing the plurality of screen nets 30 by wrapping the wide openings 20 in the screen nets 30.

The outflow pipe 13 is provided with an outflow pipe 13b for directly discharging the filtered water in the next reaction tank and an outflow pipe 13b connected to the outflow pipe 13 for removing, 13) preferably has a bolt fastening portion 13a at one side thereof.

However, the outlet pipe 13b connected to the outlet 13 may have various shapes depending on the configuration, shape, size, etc. of the wastewater treatment device, so that the shape and installation structure of the outlet pipe 13b are not limited In advance.

The mounting bracket 20 is provided with a mounting bolt 23 protruding downward from a bottom surface of the spokes 20 so as to be positioned above the inlet 11 when viewed from the side of the screen box 10, A bolt 23 is detachably coupled to a mounting hole formed in the mounting plate 12 formed around the inlet 11 in a bolt-nut coupling manner.

In addition, a planar shape of the wicker 20 is formed in a rectangular shape corresponding to the planar shape of the inflow portion 11, and a plurality of wide pores 21 are formed on the upper surface, And the air inlet 22 is connected to the air supply line 24 through an air pump (not shown), whereby the compressed air supplied through the air pump is blown out in the form of bubbles through the wide pore 21 .

The screen net 30 is formed in the form of a bag having a surface area enough to enclose the inflow section 11 of the screen box 10 and the wide openings 20 at the same time, A nylon fiber having excellent tensile strength and durability and having a certain void is formed while exhibiting sufficient solid-liquid separation performance while effectively filtering.

At this time, if the size of the voids of the screen net 30 is too large, the effect of filtration of sewage or filtration of seawater by solid-liquid separation is deteriorated. If it is too small, exchange of air and water is not smooth, Standard.

The fixing bracket 40 is fixed to the mounting plate 12 so that the fixing bracket 40 can be tightly fixed to the upper surface of the mounting plate 12 of the screen box 10 around the opening 31 of the screen net 30, In the shape of a rectangle corresponding to the plane shape of FIG.

An installation hole 12a is formed at a predetermined interval in the mounting plate 12 so that the mounting plate 12 can be detachably attached to the upper surface of the mounting plate 12. A mounting hole 12a is formed in the mounting bracket 40, It is needless to say that the through hole 41 corresponding to the through hole 12a is formed.

A process of fixing the periphery of the opening 31 of the screen net 30 between the upper surface of the mounting plate 12 and the fixing bracket 40 through the force of the mounting plate 12 and the fixing bracket 40 The opening 31 of the screen net 30 may be fixed to the fixing bracket 40 by using a core material such as a synthetic resin material so as to correspond to the fixing of the screen net 30 to the fixing bracket 40 in order to prevent the screen net 30 made of nylon fiber from being damaged. It is of course possible to form a solid rim having the through hole 31a.

An example in which the screen device for wastewater to which the technology of the present invention is applied is installed in an advanced water treatment apparatus will be described as follows.

The apparatus for high-altitude water treatment is configured to separate and store the wastewater introduced through the raw milk inflow inlet 201 formed at one side of the main body 100 partitioned by a plurality of partitions as a sedimentation type solid- A bioreactor 300 for decomposing the treated water flowing through the anaerobic tank 200 into a microorganism by aerating and agitating the treated water flowing into the anaerobic tank 200, A membrane separation tank 400 for finally discharging treated water obtained by solid-liquid separation of the supplied treated water by using the hollow fiber membrane 401 and a concentrated storage tank 500 for concentrating the sludge carried in the membrane separation tank 400 do.

The screen box 10 of the screen apparatus for wastewater according to the present invention is immersed in the bottom surface of the bioreactor 300 and the outlet pipe 13b connected to the outlet 13 is connected to the bioreactor 300 When the treated water firstly treated in the anaerobic tank 200 flows into the biological reaction tank 300, the treated water is filtered by the screen net 30 to be separated from the membrane separation tank 400).

That is, the treated water supplied into the bioreactor 300 flows into the screen net 30 through the screen net 30 which surrounds the inlet 11 of the screen box 10 immersed in the inside of the bioreactor 300, The microbes contained in the treated water, the microorganisms, the floating substances, the foreign matter, and the like are filtered through the pores of the screen net 30, Is supplied into the screen box 10 through the inlet 11a of the inlet 11 formed in the screen box 10 and then supplied to the membrane separation tank 400 through the outlet 13 of the screen box 10 The sewage is purified through a process of removing nitrogen and phosphorus components contained in the filtered water (denitrification and de-phosphorus) and a subsequent process of removing organic matter contained in the filtered water in the membrane separation tank 400 .

Meanwhile, when the process of filtering the wastewater by using the screen net 30 is performed for a long time, the sludge layer is adhered to the outer surface of the screen net 30.

That is, since the sludge containing a large amount of microorganisms has a low density and particles are not uniform, the sludge layer sticks to the screen net 30 to form a sludge layer having a certain thickness while closing the void, thereby lowering the filtration performance of the screen net 30 do.

Therefore, when the filtering performance is deteriorated due to the excessive adherence of various contaminants or sludge to the outside of the screen net 30 due to the long time filtering use of the screen net 30 as described above, It is possible to easily perform the cleaning of the screen net 30 because various contaminants or sludge attached to the outside of the screen net 30 are removed from the screen net 30 by performing aeration using the screen net 30 It is possible to eliminate the interruption of the wastewater treatment process for cleaning the screen net 30, so that more efficient wastewater treatment can be performed.

In addition, the filtering performance of the screen net 30 can be kept constant for a long time by preventing the occlusion of the screen net 30, thereby improving the sewage treatment efficiency of the wastewater treatment device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

1: screen device for wastewater 10: screen box
11: inlet portion 12: mounting plate
13: outlet 20:
21: width pore 22: air inlet
24: air supply line 30: screen network
31: opening 40: fixed bracket
41: Through hole

Claims

A screen box 10 which is box-shaped having an internal space and immersed in a treatment tank into which raw water flows;
An inflow section 11 installed at one side of the screen box 10 so as to allow the filtered water to flow therein;
An outlet (13) formed on the other side of the screen box (10) so as to discharge filtered water;
(20) provided on the inlet (11) and having a pore (21) for spraying compressed air supplied through an air pump;
A screen net 30 which surrounds the inlet 11 and the blowhole 20 and filters the foreign substances contained in the inflow water through microvoids;
The inflow portion 11 has a porous structure and is formed in a bilaterally symmetrical structure on both sides of the top of the screen box 10;
The breeches (20) are provided for each inlet (11);
Characterized in that the left and right inflow portions (11) and the wide openings (20) are surrounded by respective screen nets (30) to have a plurality of screen nets (30).

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