KR20230062971A - Drum screen device for submerged membrane separation system equipped with a conical mesh for easy sludge discharge - Google Patents

Abstract

The present invention is a drum screen device for a submerged membrane separation system, comprising: a frame 110 fixed to the ground; Rotating rollers 120 spaced apart from each other on the frame and coupled to each other; It consists of a drum 220 that is placed on the front and rear rotating rollers and rotates, and a conical mesh network 230 connected between the drums and rotated together when the drum rotates, wherein the inner diameter of the conical mesh network is the inner diameter of the rear end It is relatively smaller than the disc, and the line connecting the center point of the front end and the center point of the rear end is horizontal while being placed on the rotating roller, and a central hole is formed on the outer circumference of the front end of the conical mesh to have the same diameter as the diameter of the front end. When the frame 240 is combined and the wastewater flows in, the wastewater is discharged through the lattice of the conical mesh net, filtering out relatively large particles, and the sludge accumulated in the conical mesh net moves forward along the inclined surface of the conical mesh net to the outside Drum screen 210 to be discharged to; A hopper 130 installed under the drum screen to store the wastewater from which relatively large particles are filtered through the conical mesh net and transport it to a subsequent treatment tank; a cover installed on the hopper to open and close the hopper while protecting the drum screen; An electric motor 150 connected to the roller to rotate the roller; And a sludge storage device 160 installed on one side of the frame to receive the sludge generated in the drum screen; for a submerged membrane separation system equipped with a conical mesh net for easy sludge discharge It relates to a drum screen device.

Description

Drum screen device for submerged membrane separation system equipped with a conical mesh for easy sludge discharge}

The present invention relates to a drum screen for a submerged membrane separation system that primarily filters and removes foreign substances contained in sewage or wastewater, and more particularly, sludge generated in the process of filtering out foreign substances can be easily discharged during operation. It relates to a drum screen device for a submerged membrane separation system equipped with a conical mesh net for easy discharge of sludge.

A submerged membrane separation system is a device that purifies by filtering and filtering foreign substances such as dissolved pollutants, microorganisms, and suspended matter contained in sewage or wastewater through a biological process or a physicochemical process.

When a drum screen device treats sewage or wastewater by a biological or biological process or a physical process using such a submerged membrane separation system, relatively particles such as various suspended solids, solids, and impurities contained in the sewage and wastewater are removed. It is a device that primarily filters and removes large foreign substances.

Since the drum screen device receives sewage or wastewater and quickly removes foreign substances, it must flow into a treatment tank forming a submerged membrane separation system, so a drum screen that is easy to filter out foreign substances and has good water drainage is used. The drum screen is named because a mesh net is wound around a cylindrical drum frame, and mesh net is the most commonly used material for drum screens because of its excellent water drainage.

When the drum screen is used in a fixed state, sewage or wastewater is caught through a specific part of the drum screen, so it is easily clogged by foreign substances. It allows foreign substances to be discharged without being clogged by foreign substances (sludge). In order to rotate the drum screen, various power means are required, and the drum screen device organically combines these power means with the drum screen.

The foreign matter generated in the wastewater and not passing through the mesh of the drum screen has relatively large particles and contains a large amount of moisture, resulting in a thick sludge. In other words, since it is viscous, it is not discharged well unless the drum screen is tilted, but when the drum screen is tilted, the wastewater is concentrated to one side, causing various problems. have to do it

In order to discharge the sludge stacked on the drag screen to the outside, there is a structure in which a spiral structure is formed on the bottom of the mesh net and the spiral structure is rotated to discharge the sludge along the spiral structure, but when such a spiral structure is formed The structure is also complicated, and if you try to clean it with water after use, the sludge is stuck to the spiral structure, making it difficult to clean it.

If the sludge is accumulated on the mesh net, the function of the drum screen cannot be performed properly because drainage is not possible. Therefore, whenever a certain amount of sludge accumulates on the mesh network, the operation of the drum screen device must be stopped and the accumulated sludge must be removed, so that the supply of treated water is delayed and the treatment efficiency of wastewater is inevitably reduced.

Republic of Korea Patent No. 10-2017585 Registered Utility Model No. 20-0432736 Patent Publication No. 10-2012-133601 (2012.12.11) Republic of Korea Patent Publication No. 10-2005-116566 (2005.12.13) Republic of Korea Patent Publication No. 10-2006-7874 (2006.01.26) Republic of Korea Patent No. 10-1554924 (2015.09.16)

The present invention is to solve the above problems, by changing the mesh structure of the drum screen so that the sludge accumulated on the mesh network is better discharged to the outside during operation of the device, so that the treated water is smoothly supplied to the treatment tank of the membrane separation device. It is intended to provide a drum screen device for a submerged membrane separation system equipped with a conical mesh net that can easily discharge sludge that can be supplied appropriately.

In order to achieve the above object, the present invention provides a drum screen device for a submerged membrane separation system, comprising: a frame 110 fixed to the ground; Rotating rollers 120 spaced apart from each other on the frame and coupled to each other; It consists of a drum 220 that is placed on the front and rear rotating rollers and rotates, and a conical mesh network 230 connected between the drums and rotated together when the drum rotates, wherein the inner diameter of the conical mesh network is the inner diameter of the rear end It is relatively smaller than the disc, and the line connecting the center point of the front end and the center point of the rear end is horizontal while being placed on the rotating roller, and a central hole is formed on the outer circumference of the front end of the conical mesh to have the same diameter as the diameter of the front end. When the frame 240 is combined and the wastewater flows in, the wastewater is discharged through the lattice of the conical mesh net, filtering out relatively large particles, and the sludge accumulated in the conical mesh net moves forward along the inclined surface of the conical mesh net to the outside Drum screen 210 to be discharged to; A hopper (130) installed under the drum screen to store the wastewater from which relatively large foreign substances are filtered through the conical mesh net and transport it to a subsequent treatment tank; a cover installed on the hopper to open and close the hopper while protecting the drum screen; An electric motor 150 connected to the roller to rotate the roller; And a sludge storage device 160 installed on one side of the frame to receive the sludge generated in the drum screen; for a submerged membrane separation system equipped with a conical mesh net for easy discharge of sludge, characterized in that it comprises a. A drum screen device is provided.

In addition, the conical mesh network 230 has several different inclinations connecting the front end and the rear end because the diameters of the front end and the rear end are different, and the center hole (H) corresponding to the diameter of the rear end of the conical mesh network 230 is provided. It is characterized in that several disc frames 240 are further provided, and a flange 242 is formed on the outer circumference of the disc frame 240 to increase the contact area with the inner circumferential surface of the drum 220, thereby increasing the disc frame 240. It is characterized by dispersing the external force applied to the inner circumferential surface of the drum 220 by.

According to the present invention, an inclined surface is created by the conical mesh net without tilting the drum screen, so that the sludge generated during operation of the device advances along the inclined surface and is smoothly discharged, greatly reducing the stacking amount. The time or rate of stopping is greatly reduced, which can increase processing efficiency.

In addition, since the cylindrical mesh network rotates together with the drum screen, the phenomenon in which the sludge stacked on the conical mesh network falls to the floor due to gravity during rotation of the conical mesh network and is stuck to the conical mesh network due to repeated motions is greatly reduced. If the sludge is not fixed, the fluidity is improved, so the sludge advances better and the discharge to the sludge storage device is also rapid.

1 shows a drum screen device according to the present invention.
Figure 2 shows that the drum screen according to the present invention is located between the hopper and the cover.
Figure 3 shows the coupling relationship between the mesh network of the drum screen and the disk frame according to the present invention.

The present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 3 , a frame 110 fixed to the ground and having various components installed therein is provided.

A drum screen 210 is installed on the frame 110 . The drum screen 210 filters foreign substances such as various relatively large particles of suspended matter, solid matter, and impurities from the wastewater continuously flowing through the inlet pipe ( ), and is formed in the form of a mesh so that the wastewater can flow to the next treatment tank. It is done.

A pair of rotary rollers 120 are installed on the frame 110 in front and back, and the drum screen 210 is placed thereon so that the drum screen 210 can rotate on the rotary roller 120. An electric motor 150 is installed on one side of the rotary roller 120 and is connected to the rotary roller 120 to rotate the rotary roller 120 by driving the electric motor 150 to rotate the drum screen 210 thereon. can make it

The drum screen 210 is composed of a pair of drums 220 rotating on a rotating roller 120 and a conical mesh network 230 coupled between the drums 220 and rotating together with the drums 220. Both ends of the conical mesh network 230 are inserted into the inner wall of the cylindrical drum 220 and rotate together when the drum 220 rotates. The conical mesh network 230 is detachable from the drum 220.

The conical mesh network 230 is composed of a wire mesh 232 through which foreign substances are substantially filtered and a mesh frame 234 which reinforces the structure of the wire mesh. The net frame 234 is formed at the front end, rear end, and center of the wire net 232 to reinforce the structure so that the conical mesh net 230 is not sagging or twisted. Since the conical mesh network 230 is conical, the diameters of the front end and the rear end are different. If such a conical mesh network 230 is placed on the rotating roller 120 as it is, the center line of the conical mesh network 230 placed on the rotating roller 120 does not work properly because a step is continuously generated according to the rotation angle during rotation. You need to make this level.

The position of the rotating roller in the front part can be increased so that the center line of the conical mesh network 230 is horizontal on the rotating roller 120, but if the installation height of the rotating roller 120 installed on both sides is different, it becomes structurally complex and mechanically become unstable Therefore, since the design is complicated, a disc frame 240 having the same diameter as the tip of the conical mesh net is inserted into the net frame formed at the tip of the conical mesh net 230 so that the rotating roller 120 can be leveled without changing the height. .

The disc frame 240 has the same diameter as the front end of the conical mesh net and forms a relatively wide flange 242 on the outer circumference so that it can be stably seated on the rotating roller 120.

Therefore, when the conical mesh network 230 is coupled between the drums 220, the front end is coupled by inserting the net frame 234 into the inner circumferential wall of the drum 220, but the rear end is coupled with the disk frame 240 inside the drum 220. It is inserted and joined to the main wall.

The inclination of the front and rear ends of the conical mesh network 230 is 10 to 20 °. If the inclination is 20 ° or more, when the conical mesh network 230 rotates, the possibility that the wastewater is discharged to the outside in an unfiltered state increases as the conical mesh network 230 leans toward the tip, and if the inclination is 10 ° or less The forward speed of the foreign matter accumulated in the conical mesh net 230 is lowered.

At the lower part of the drum screen 210, a hopper 130 is installed to temporarily store the wastewater primarily contaminated with foreign substances in the drum screen 210 in order to send it to each treatment tank, and above the hopper 130, the drum screen 210 ) A cover 140 that opens and closes the hopper 130 while protecting the cover 140 is installed.

At the rear of the frame 110, a chute 170 is installed at a predetermined distance from the drum screen 120. The chute 170 prevents the sludge generated from the drum screen 120 from scattering when it is discharged. One side is blocked and the other side is open, so when the sludge flows into the open part and scatters, the other side is blocked. This is to prevent the sludge from scattering to the outside.

The frame 110 is supported by four legs 112, one each on the front, rear, left and right sides, forming a cradle 180 connecting between the two legs 112 at the lower rear.

On one side of the frame 110, a sludge storage device 180 for processing the sludge discharged from the conical mesh network 230 is installed so as to be located at the bottom of the chute 170.

The operation of the apparatus according to the present invention configured as described above will be described.

When the device is operated, the rotary roller 120 rotates by the operation of the motor, and the drum screen 210 placed on the rotary roller 120 also rotates together. When the wastewater flows into the rotating drum screen 210 through the inlet pipe I, foreign substances with large particles mixed in the wastewater are caught by the conical mesh net 230, and the wastewater flows into the hopper 130, respectively. is sent to the treatment tank of

In the conical mesh network 230, the slope is reversed based on the center line connecting the midpoint of the front end and the midpoint of the rear end of the conical mesh network 230. A portion lower than the center line has a slope that increases from the front end to the rear end of the conical mesh network 230, but a portion higher than the center line has a slope that decreases from the front end to the rear end of the conical mesh network 230.

The sludge should move toward the front end of the conical mesh net and be discharged to the outside where the sludge storage device 180 is located. Since the force that moves the sludge is gravity, it advances along the slope below the center line and moves backward above the center line. . That is, theoretically, while the conical mesh network 230 rotates, 1/2 of the time for one rotation is forward and 1/2 is backward. Since the conical mesh network 230 has a conical shape that is not eccentric, the sludge moves backward as much as the forward distance during one rotation, and thus the sludge cannot move forward.

However, the wastewater introduced into the conical mesh network 230 is not discharged to the entire surface of the conical mesh network 230, but is discharged through the inlet pipe I to the bottom of the conical mesh network 230. In addition, when the conical mesh 230 rotates and the sludge accumulated on the floor is located higher than the center line, it does not flow backward while flowing along the inclined surface, but is separated from the wire mesh 232 by gravity and falls below it.

That is, even if the sludge is located higher than the center line, not all of the sludge clinging to the wire mesh falls to the floor due to gravity, but most of the sludge falls due to repeated rotation. That is, below the center line, it advances along the slope of the conical mesh network 230, and at a place higher than the center line, only part of it moves backward along the slope and most of it falls to the floor and advances. Even if the mesh 230 rotates, it continues to move forward and is discharged to the sludge storage device 180.

The sludge discharged from the sludge storage device 180 is collected and sent to a sludge thickening treatment tank for treatment.

110: frame 120: rotating roller
130: Hopper 140: Cover
150: electric motor 170: chute
180: sludge storage device
210: drum screen 220: drum
230: conical mesh network 232: mesh network
234: network frame
240: disc frame 242: flange

Claims (3)

In the drum screen device for a submerged membrane separation system,
A frame 110 fixed to the ground;
Rotating rollers 120 spaced apart from each other on the frame and coupled to each other;
It consists of a drum 220 that is placed on the front and rear rotating rollers and rotates, and a conical mesh network 230 connected between the drums and rotated together when the drum rotates, wherein the inner diameter of the conical mesh network is the inner diameter of the rear end. It is relatively smaller than the disc, and the line connecting the center point of the front end and the center point of the rear end is horizontal while being placed on the rotating roller, and a central hole is formed on the outer circumference of the front end of the conical mesh to have the same diameter as the diameter of the front end. When the frame 240 is combined and the wastewater flows in, the wastewater is discharged through the lattice of the conical mesh net, filtering out relatively large particles, and the sludge accumulated in the conical mesh net moves forward along the inclined surface of the conical mesh net to the outside Drum screen 210 to be discharged to;
A hopper (130) installed under the drum screen to store the wastewater from which relatively large foreign substances are filtered through the conical mesh net and transport it to a subsequent treatment tank;
a cover installed on the hopper to open and close the hopper while protecting the drum screen;
An electric motor 150 connected to the roller to rotate the roller; and
A sludge storage device 160 installed on one side of the frame to receive the sludge generated in the drum screen;
A drum screen device for a submerged membrane separation system equipped with a conical mesh net for easy discharge of sludge, characterized in that it comprises a. According to claim 1,
The conical mesh network 230 has a number of different inclinations connecting the front end and the rear end because the diameters of the front end and the rear end are different, and has a center hole H corresponding to the diameter of the rear end of the conical mesh network 230. A drum screen device for a submerged membrane separation system equipped with a conical mesh net for easy discharge of sludge, characterized in that several disk frames 240 are further provided. According to claim 1,
A flange 242 is formed on the outer circumference of the disc frame 240 to increase the contact area with the inner circumferential surface of the drum 220 to disperse the external force applied to the inner circumferential surface of the drum 220 by the disc frame 240. Characterized in that A drum screen device for a submerged membrane separation system equipped with a conical mesh net for easy sludge discharge.

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