KR100610333B1 - Carrier screen device and structure for construction thereof - Google Patents

Abstract

The present invention relates to a carrier screen device configured to prevent carrier loss and to secure a cross-sectional area of water, and to maximize the discharge of contaminants introduced from the outside while minimizing the outflow of the carrier.

Such a carrier screen device includes a screen body that forms the overall shape of the screen device, a screen aerator provided at the bottom of the screen device to form an air flow so that the carrier and the workpiece do not collide with the screen, and formed on the body. And a plurality of holes through which the treated water cannot pass while the treated water passes, and the holes provide a carrier outflow screen device having a circular shape and a slot shape.

The screen body has a structure that is continuously bent in a waveform corresponding to each other while maintaining a predetermined interval in order to secure sufficient water supply cross-sectional area and reinforce the mechanical strength, the circular hole is formed in the upper and lower parts of the body, the slot is It is formed in the center of the body is configured to smooth the flow of influent water while preventing the outflow of the carrier.

The upper end of the screen body is formed as an upper cut-off of the block structure is configured to guide the water flow rising from the bottom of the aerobic tank by the screen aerator to naturally fall to prevent the carrier from being accumulated in the screen body, the lower end of the screen body It is formed by the lower block of the block structure is configured to convert the air flow generated in the screen aerator to vertical flow and to maximize the rising flow rate, the scum discharge port is formed on both sides of the upper block.

In addition, the present invention, in the installation structure of the carrier screen device consisting of a screen and a screen aerator in the aerobic tank of the wastewater treatment apparatus for biochemically purifying the organic matter in the wastewater,

The center portion of the screen is configured to be positioned rearward at a predetermined distance from the end of the screen, and provides a carrier screen mounting structure in which the center portion of the screen is positioned behind the both ends of the screen in the aerobic direction in the aerobic tank.

The pipe connected to the screen aerator is separated from the diffuser pipe so that a separate blower is mounted to easily adjust the amount of air.

Carrier, Screen, Round Hole, Slot, Screen Aerator

Description

Carrier screen device and its installation structure {CARRIER SCREEN DEVICE AND STRUCTURE FOR CONSTRUCTION THEREOF}

1 is a perspective view of a carrier screen device according to the present invention;

2 is a plan view of a carrier screen device according to the present invention;

Figure 3 is a view showing the flow of water flow by the upper and lower blocking plates formed on the carrier screen device according to the present invention.

Figure 4 is a plan view showing the installation of the carrier screen device according to the present invention.

5 is a plan view showing an installation state of a carrier screen device according to the prior art.

Figure 6 is a view showing the water flow path by the air from the screen aerator and aerobic diffuser in the carrier screen device according to the prior art.

The present invention relates to a carrier screen for preventing carrier outflow during wastewater and wastewater treatment using a fluidized microorganism carrier, and more particularly, to prevent carrier loss and to secure a cross-sectional area of the carrier, thereby minimizing the outflow of the carrier. The discharge of the contaminants relates to a carrier screen device and its installation structure which are configured to be maximized.

Generally, bioreactors are composed of anaerobic tanks, anaerobic tanks, and aerobic tanks for the advanced treatment of sewage and wastewater, and fluidized microbial carriers are filled in the aerobic tanks to increase the amount of microorganisms so that they are resistant to load fluctuations and induce smooth nitrification even at low water temperatures. Advanced wastewater treatment technology using a sieve is being actively applied.

The core technology of the fluid carrier process is a carrier screen device for preventing carriers and carrier spills. As shown in FIG. 6, the carrier screen used in the existing construction method includes a screen body 100 having a constant area and a flat surface, and a plurality of holes 110 formed in the body 100. The carrier screen has many problems as follows.

First, since the shape of the holes 110 are all circular holes, the conventional carrier screen 100 frequently causes clogging due to hairs and impurities contained in the influent.

Secondly, as shown in FIG. 5, the conventional carrier screen 100 is installed in an aerobic tank at right angles to the direction of water flow, so that the carrier 200 is totally directed toward the screen 200 in the case of a blower shutdown. Since blocking the carrier, there is a problem that the carrier 200 is lost to the settling tank due to the blockage of the flow of the treated water to increase the level in the aerobic tank.

Third, as shown in FIG. 6, the conventional carrier screen 100 is flat and structurally vulnerable to water pressure due to water flow and carrier flow when installed in an aerobic tank.

This problem is very serious where the screen function of the front end of the treatment plant is weak and a large amount of contaminants such as hair, fibers, and vinyl are introduced into the treatment plant.

 The present invention has been made to solve the conventional problems as described above, the object of the present invention is to prevent carrier loss and to ensure the cross-sectional area of the water, to minimize the outflow of the carrier while maximizing the discharge of contaminants introduced from the outside To provide a carrier screen device and its installation structure is configured to.

The carrier screen device proposed by the present invention includes a screen main body forming the overall shape of the screen device, a screen aerator installed at the lower part of the screen device to form an air flow so that the carrier and the workpiece do not cooperate with the screen; It is formed in the main body includes a plurality of holes through which the treated water is not allowed to pass through the carrier, the hole provides a carrier leakage prevention screen device consisting of a circular and slot form.

The screen body has a structure that is continuously bent in a waveform corresponding to each other while maintaining a predetermined interval in order to secure sufficient water supply cross-sectional area and reinforce the mechanical strength, the circular hole is formed in the upper and lower parts of the body, the slot is It is formed in the center of the body is configured to smooth the flow of influent water while preventing the outflow of the carrier.

The upper end of the screen body is formed as an upper cut-off of the block structure is configured to guide the water flow rising from the bottom of the aerobic tank by the screen aerator to naturally fall to prevent the carrier from being accumulated in the screen body, the lower end of the screen body It is formed as a lower block portion of the closed structure is configured to convert the air flow generated from the screen aerator to vertical flow and to maximize the flow rate, the scum discharge port is formed on both sides of the upper block.

In addition, the present invention, in the installation structure of the carrier screen device consisting of a screen and a screen aerator in the aerobic tank of the wastewater treatment apparatus for biochemically purifying the organic matter in the wastewater,

The center portion of the screen is configured to be positioned rearward at a predetermined distance from the end of the screen, and provides a carrier screen mounting structure in which the center portion of the screen is positioned behind the both ends of the screen in the aerobic direction in the aerobic tank.

The pipe connected to the screen aerator is separated from the diffuser pipe so that a separate blower is mounted to easily adjust the amount of air.

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

1 is a perspective view of a carrier screen device according to the present invention, and FIG. 2 is a plan view of the carrier screen device according to the present invention, and reference numeral 2 designates a screen body forming the overall shape of the carrier screen device.

The screen body 2 may be formed in a size of about 6m deep and 5m wide and may be made of one member or two or more pieces, and then connected to each other, such a screen body ( 2) is installed in the wastewater treatment facility to perform a very important function to prevent the carrier from exiting the aerobic tank due to the influent flow and lost to the sedimentation tank, preferably a colloid such as hair, fibers, vinyl, etc. contained in the influent It should be designed to minimize the blockage caused by the system and have excellent structural stability.

To this end, the screen body 2 has a structure in which the screen body 2 is continuously bent by the bent portions 16 of the corrugations corresponding to each other while maintaining a predetermined interval in the longitudinal direction so as to reinforce mechanical strength with sufficient water supply cross-sectional area. It is formed to withstand the pressure acting on the screen body (2) by the flow of water and carrier flow.

In addition, the carrier screen device of the present invention is provided with a screen aerator 4 at the bottom of the screen to prevent the carrier from being directed to the screen body 2 by the influent flow, and to remove the impurities trapped on the screen.

The screen aerator 4 may have a structure in which a plurality of micropores 5 are drilled in the direction of about 45 degrees downward toward the screen body 2 in a # 60 to 120 mm pipe.

The screen device main body 2 is formed with a plurality of perforation holes to discharge the treated water, which minimizes the discharge of carriers while maximizing the discharge of the contaminants (hair, fibers, vinyl, etc.) introduced from the outside with the treated water. Is done.

For this purpose, circular holes 6 are formed in the upper and lower portions of the main body 2, and slots 8 are formed in the central portion of the main body 2.

When holes are formed in the screen body 2 in this manner, the circular holes 6 are weak against blockage and safe for carrier outflow, and the slots 8 are strong for blockage, but there is a high risk of carrier outflow. This minimizes the outflow of the carrier and facilitates the discharge of the workpiece.

When the screen aerator 4 is operated, the trajectory of the water flow becomes oblique in the direction of the next tank from the screen aerator 4 toward the lower and upper portions of the screen body 2 as indicated by arrows in FIG. 3. The lower and upper portions of the screen body 2 are suitable for the outflow of carriers, so the circular hole 6 is suitable, while the vertical rise in the center portion of the screen body 2 prevails, so the carriers are less likely to leak out. ), It is possible to easily secure the area of communication and at the same time it is possible to effectively exclude the constriction such as hair.

In the above, the size of the circular hole 6 and the slot 8 depends on the size of the fluidized bed carrier, but the diameter is approximately 6 ~ 12mm, and the effective hole area is 30 to 70% of the main body 2 area to be sufficiently secured Minimize blockage by

And the length of the slot (8) is formed of about 8 ~ 30cm, the width of about 6mm.

When the effective perforated area is less than 30% of the area of the main body 2, a water impairment may occur. If the effective perforated area is 70% or more relative to the main area 2, the strength of the screen is weakened.

The upper end of the screen body 2 is formed of an upper cut-off portion 10 having a structure in which a central portion is blocked, so that the flow of water raised from the lower portion of the aerobic tank by the screen aerator 4 naturally descends as shown in FIG. 3. As indicated by the lowering flow, the carrier is prevented from accumulating on the screen body 2. Scum discharge ports 12 are formed at both sides of the upper cut-off portion 10.

The lower end of the screen body 2 is formed with a lower cut-off portion 14 without holes formed so as to convert the air flow generated by the screen aerator 4 into vertical flow and maximize the ascending flow rate.

Therefore, in the present invention, the reduction of the screen passing cross-sectional area by the carrier itself generated in the existing carrier screen does not occur.

The installation of such a carrier screen is such that the screen body 2 of the present invention as described above is bent and installed as shown in FIG. 4, whereby the conventional screen is " I " In the present invention, the central portion 310 of the screen 300 is formed of a side portion 330 bent rearwardly at a predetermined distance from the end portion 320 of the screen, whereas in the present invention, the water flow direction in the aerobic tank is performed. With respect to the center portion 310 of the screen is installed so as to be located rearward than both ends 320 of the screen.

At this time, the bending of the scum discharge port 12 is bent in the longitudinal direction so that the end portion 320 and the side portion 330 of the screen 300, the upper cut-off portion 10 of the screen 300 to the center portion 310 is formed. Just do it.

Accordingly, the carrier screen installed in the conventional "I" type prevents the treatment water flow by blocking all sides of the screen and ultimately when the carrier filled in the aerobic tank is driven to the screen portion by the influent flow in the emergency when the blower stops working. Although there is a possibility that the treatment tank is overflowed or damaged by water pressure, the response to the emergency is weak, but the carrier screen installation structure of the present invention has the center portion 310 which is bent at the carrier 200 which is driven to the screen 300 in such an emergency. There is no risk of overflowing the treatment tank is secured through the surface of both ends 320 and the side portion 330, in particular, because the side portion 330 of the screen 300 is installed in the direction parallel to the direction of the water flow or hair There is no blockage, and the flow of treated water is always possible even in an emergency.

The main purpose of the screen aerator (4) installed in the lower part of the screen is to create a vertical upward flow of air flow in front of the screen so that the carrier and the contaminants do not collide with the screen is a very important device in the carrier process.

Therefore, it is necessary to keep the amount of air supplied to the screen aerator 4 constant, and it is necessary to periodically supply excess air to clean the carrier screen 300. However, the air pipes going to the existing screen aerators are branched from the main pipes going to the aerobic tanker, and adjusted by valves. This is because it is impossible to supply a sufficient amount of air when the aerobic tank water flow increases due to the screen clogging gradually. You will not meet. At the same time, there is an operational difficulty in adjusting the valves of all diffuser piping when a temporary excess air supply for screen cleaning is required.

Accordingly, in the present invention, such a problem can be solved by separating a pipe (not shown) going to the screen aerator 4 from the diffuser pipe and installing an independent blower, and in particular, supplying excess air for cleaning the screen 300. Operation is very efficient since only the valve of the sea screen aerator 4 blower needs to be operated.

As described above, in the carrier screen device according to the present invention, circular holes are formed in the upper and lower portions of the screen device main body, and slots are formed in the central part, thereby minimizing the outflow of the carrier and discharging the contaminants introduced from the outside with the treated water. Is easily done.

In addition, since the lower portion of the screen is formed with a lower blocking portion of the blocked structure, and the upper portion of the screen is formed with an upper blocking portion of the blocked structure, the air flow generated by the screen aerator is converted into vertical flow to maximize the rising flow rate, The descent flow is induced so that the carrier naturally descends to prevent the carrier from being accumulated in the screen body.

The screen device is installed in a state in which the center of the screen is bent rearward from both ends of the screen with respect to the water flow direction, so that carriers driven to the screen in an emergency such as stopping the blower are accumulated at the center of the screen, There is no risk of overflowing the treatment tank through the scum discharge port formed in the side part, and especially the side part of the screen is located in the direction parallel to the direction of the water flow, which prevents the screen from being blocked by contaminants. Reduction of the screen passing cross-sectional area by the carrier itself does not occur.

Claims (6)

A screen body forming the overall shape of the screen device, a screen aerator installed under the screen device to form an air flow to prevent the carrier and the contaminants from being caught on the screen, and a carrier formed on the body to allow the treated water to pass therethrough. Contains a number of holes that are not allowed to pass, The hole is formed in the shape of a circular hole and a slot, the circular hole is formed in the upper and lower parts of the main body, the slot is formed in the center of the main body, the screen body is a predetermined interval to secure sufficient water cross-sectional area and reinforce the mechanical strength Carrier screen device that is continuously bent in a waveform corresponding to each other in the longitudinal direction. delete delete The method of claim 1, wherein the upper end of the screen body is formed by the upper block of the block structure is configured to prevent the carrier from being accumulated in the screen body by inducing the flow of water rising from the bottom of the aerobic tank by the screen aerator naturally falls, the The lower end of the screen body is formed as a lower blocking portion of the closed structure is configured to convert the air flow generated in the screen aerator to vertical flow and to maximize the ascending flow rate, the carrier having a scum discharge port formed on both sides of the upper blocking portion Screen device. In the installation structure of the carrier screen device consisting of a screen and a screen aerator in the aerobic tank of the wastewater treatment device for biochemically purifying organic matter in the wastewater, The center portion of the screen is configured to be positioned rearward at a predetermined distance from the end of the screen, the carrier screen mounting structure is installed so that the center portion of the screen is located behind the both ends of the screen in the aerobic direction in the aerobic tank. The carrier screen installation structure according to claim 5, wherein the pipe connected to the screen aerator is separated from the diffuser pipe and equipped with a separate blower to easily adjust the air amount.

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