KR101642025B1

KR101642025B1 - A Multi Filter Type of a Drum Screen Apparatus Having a Structure of Rotating Nozzles

Info

Publication number: KR101642025B1
Application number: KR1020150153398A
Authority: KR
Inventors: 이상우
Original assignee: (주)현대워터텍
Priority date: 2015-11-02
Filing date: 2015-11-02
Publication date: 2016-07-22

Abstract

The present invention relates to a multi-filter type drum screen apparatus having a vacuum suction structure, and more particularly to a multi-filter type drum screen apparatus having a vacuum suction structure, which is capable of controlling concentration of floating solids. The multi-filter type drum screen apparatus having a vacuum suction structure comprises: a drum screen (11) which is disposed inside a filter housing (H), and in which a circular-shaped filter unit (111) is disposed; one or more suction nozzle units (13a to 13n) which are disposed in directions vertical to a rotating shaft (112) extending along a longitudinal direction of the drum screen (11); an inflow unit (14) which introduces water, including floating solid materials, into the filter housing (H); a discharge unit (15) which discharges water having passed through the drum screen (11); and a suction pump (16) which applies suction pressure to the suction nozzle units (13a to 13n); wherein the suction nozzle units (13a to 13n) are rotated along with the rotating shaft (112).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-filter type drum screen apparatus having a vacuum suction structure,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-filter type drum screen of a vacuum suction structure, and more particularly, to a multi-filter type drum screen device of a vacuum suction structure capable of adjusting a suspended solid concentration.

A screen filter is used to remove foreign matter contained in water, and there is a rotating screen or drum screen of a structure in which a screen is installed in a cylindrical shape so as to be operated continuously or in a circulating manner. Drum screens can be used, for example, to remove feed debris or fish excrement contained in the water of an eel farm. In the case of farms, the removal level of Suspended Solids in the farm should be about 20 ㎛ to form favorable conditions for eel culture. However, when the known drum screen is used, there is a problem that the SS concentration of about 120 μm is removed. Therefore, development of a drum screen having an appropriate level of filtering performance depending on the species to be cultured is required.

Patent Registration No. 10-1009439 discloses a rotary drum in which a circular surface is closed, an opposite circular surface is opened to form an opening into which the wastewater flows, and a screen net for filtering sludge is mounted on a side surface of the cylinder. A center shaft rotatably supporting the rotary drum; A drum driving device for rotating the rotary drum; A support frame in which a central axis is fixed, sewage is introduced, and a filtration water passing through a screen net collects is installed in a simple water tank; A partition wall which is installed so as not to open the opening in the support frame and blocks the wastewater and filtrate water from being mixed in the simple water tank; A sealing plate installed on the partition wall so as to overlap an inner surface of the opening so as to cover the gap between the partition and the opening; An injector installed on the support frame outside the rotary drum for spraying filtered water to remove sludge adhering to the screen mesh; A sludge receiver installed inside the rotary drum to receive the sludge which is installed to oppose the sprayer; And a discharge duct connected to the sludge receiver for discharging the sludge.

Patent Registration No. 10-1089549 includes a rotating device, a driving part for rotating the rotating device, a washing water injecting device provided outside the rotating device, a collecting device for collecting foreign substances in the rotating device, and a guide roller for supporting the rotating device A non-vibration and silent type drum screen device is disclosed.

The drum screen disclosed in the prior art has a structure in which the circulating water flows into the drum screen body and the concentration of the suspended solid material rises as the concentration of the suspended solid material rises while the drum screen body rotates and a part thereof is collected downwardly, . However, the drum screen having such a structure has a problem that it is difficult to remove fine contaminants, for example, and thus it is difficult to make the suspended solid concentration to a predetermined level. Further, there is a problem that the drum screen device must be continuously operated. Therefore, there is a need to develop a drum screen device that allows the concentration of suspended solids to be maintained at a predetermined level while simultaneously reducing power consumption.

The present invention has as its object to solve the problems of the prior art.

Prior art 1: Patent registration No. 10-1009439 (Yoon Mi-ja, announcement on Jan. 19, 2011) Drum screen Prior Art 2: Patent Registration No. 10-1089549 (Seo Jeong-tae, Announcement of December 06, 2011) Noiseless and Noiseless Drum Screen Device for Fish Farm

It is an object of the present invention to provide a multi-filter type drum screen device of vacuum suction structure capable of adjusting the suspended solid concentration and reducing power consumption.

According to a preferred embodiment of the present invention, a multi-filter type drum screen apparatus of a vacuum suction structure is provided with a drum screen disposed inside a filtering housing and having a circular-shaped filter unit disposed therein; At least one suction nozzle unit disposed in a direction perpendicular to a rotation axis extending along the longitudinal direction of the drum screen; An inflow unit for introducing water containing suspended solids into the interior of the filtration housing; A discharge unit for discharging the water passing through the drum screen; And a suction pump for applying a suction pressure to the suction nozzle unit, and the suction nozzle unit is rotated in accordance with the rotation of the rotation shaft.

According to another preferred embodiment of the present invention, the filter unit comprises: a protective layer disposed on both sides of the filter layer; And an aggregate layer disposed under one protective layer.

According to another preferred embodiment of the present invention, each of the suction nozzle units comprises an extension tube extending from the rotation axis; A suction nozzle for collecting suspended solids; And an elastic connecting member disposed between the extension tube and the suction nozzle.

According to another preferred embodiment of the present invention, a collecting hole is formed in the collective layer.

The drum screening apparatus according to the present invention makes it possible to remove contaminants which cause death of cultured fish such as eel such as ammonia nitrogen, nitric acid or nitrite. As a result, bacterial propagation is inhibited, thereby reducing fish diseases. The drum screen apparatus according to the present invention is capable of removing suspended solids having a size of about 30 占 퐉, thereby allowing the suspended solid concentration of a farm to be maintained at a predetermined level. Further, the pressure measurement according to the present invention enables the power consumption to be reduced by operating the device according to the concentration of the suspended solid material.

1 shows an embodiment of a drum screen device according to the present invention.
2 shows an embodiment of a multi-filter and a suction nozzle applied to a drum screen device according to the present invention.
3 shows another embodiment of the drum screen apparatus according to the present invention.
4A and 4B illustrate an operation of the drum screen apparatus according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so that they will not be described repeatedly unless necessary for an understanding of the invention, and the known components will be briefly described or omitted. However, It should not be understood as being excluded from the embodiment of Fig.

Fig. 1 shows an embodiment of a drum screen device 10 according to the present invention.

Referring to FIG. 1, a drum screen apparatus 10 includes a drum screen 11 disposed inside a filtering housing H and having a filter unit 111 in a circular shape disposed therein; At least one suction nozzle unit (13a to 13n) arranged in a direction perpendicular to a rotation axis (112) extending along the longitudinal direction of the drum screen (11); An inlet unit (14) for introducing water containing suspended solids into the interior of the filtration housing (H); A discharge unit (15) for discharging the water that has passed through the drum screen (11); And a suction pump 16 for applying a suction pressure to the suction nozzle units 13a to 13n. The suction nozzle units 13a to 13n are rotated in accordance with the rotation of the rotary shaft 112.

The drum screen apparatus 10 according to the present invention may be installed in a farm and be applied to filtration of feed residue, excrement or external inflow material. The drum screen device 10 may be, for example, installed in an eel farm to allow the water in the farm to have a predetermined level of suspended solids (SS) concentration, but not limited thereto, Of the farms.

The filtration housing H may have a hollow cylindrical shape and may have a structure capable of circulating water while the drum screen 11 is disposed therein. Water in the farm can be introduced through the inlet unit 14 installed at one end of the filtration housing H. The inflowed water can be filtered through the drum screen 11 and discharged through the discharge unit 15. The inflow of water through the inflow unit 14 can be by an apparatus such as, for example, a circulation pump, but is not limited thereto, and water from the farm may be introduced into the interior of the filtration housing H through various means known in the art .

The drum screen 11 can be disposed inside the filtration housing H. The drum screen 11 may have a cylindrical shape having a circumferential surface composed of the filter unit 111 and may be arranged to be coaxial with the filtration housing H. Specifically, the drum screen 11 can be made smaller in radius and length of the cylindrical shape than the filter housing H. The water introduced by the filter unit 111 arranged along the peripheral surface of the drum screen 11 can be filtered and the introduced water is discharged to the outside of the drum screen 11 via the filter unit 111 And can be returned to the farm through the discharge unit 15. Thus, in the drum screen apparatus 10 according to the present invention, the water is circulated from the farm to the front side of the filtration housing H, via the middle or rear portion of the drum screen 11 and the filtration housing H, Lt; / RTI >

At least one suction nozzle unit 13a to 13n may be disposed on the rotary shaft 112 arranged in the longitudinal direction along the center of the cylindrical drum screen 11. [ The suction nozzle units 13a to 13n may extend in a direction perpendicular to the extending direction of the rotary shaft 112 and may extend from the rotary shaft 112 to the side of the filter unit 111 forming the peripheral surface of the drum screen 11. [ And may be disposed facing the inner surface. The suction nozzle units 13a to 13n arranged at the same or different intervals on the rotary shaft 112 may be arranged to face different directions depending on their arrangement positions. The suction nozzle units 13a to 13n may extend to a position adjacent to the inner surface of the filter unit 111 and a nozzle inlet having a relatively large inflow area may be formed at the end portion. Suspended solids accumulated in the filter unit 111 are collected through the suction nozzle units 13a to 13n and can be discharged to the outside through the inside of the rotating shaft 112. [

A plurality of inflow holes 113 are formed in the front portion of the drum screen 11 so that unfiltered water introduced through the inflow unit 14 flows into the drum screen 11. The inlet hole 113 can be made in various structures, and the present invention is not limited to the embodiments shown.

The drive connection portion 17 may be disposed on one side of the filtration housing H and the drive connection portion 17 may be connected to the drive motor so that the rotation axis 112 may be rotated. Accordingly, the suction nozzle units 13a to 13n are rotated to suck suspended solids adhering to the inner surface of the filter unit 111. The suspended solids flowing into the suction nozzle units 13a to 13n may be delivered through the interior of the rotating shaft 112 and discharged to the outside through a discharge conduit 161 disposed in the driving connection portion 17. [

The suspended solids attached to the inner surface of the filter unit 111 are not easily separated from the filter unit 111 due to the pressure of water discharged to the outside of the drum screen 11. [ Therefore, adequate pressure must be applied for the separation and collection of suspended solids. According to the present invention, the suction pump 16 can be installed to generate a pressure toward the inner surfaces of the suction nozzle units 13a to 13n. The suction pump 16 may be connected to the exhaust conduit 161 and the exhaust conduit 161 may be connected to the rotary shaft 112 and the rotary shaft 112 may be connected to the suction nozzle units 13a to 13n. By applying a suction pressure to the discharge conduit 161 by the suction pump 16, pressure can be applied to the inlet face of the suction nozzle units 13a to 13n. The suspended solids adhered to the inner surface of the filter unit 111 can be introduced into the suction nozzle units 13a to 13n and discharged through the discharge conduit 161 to the outside.

The suspended solids in the drum screen apparatus 10 according to the present invention are introduced into and removed from the suction nozzle units 13a to 13n and the ends of the suction nozzle units 13a to 13n are connected to the end portions of the filter unit 111 Respectively. Therefore, the filter unit 111 and the suction nozzle units 13a to 13n need to have a structure suitable for the removal of suspended solids.

2 shows an embodiment of a multi-filter and a suction nozzle applied to a drum screen device according to the present invention.

Referring to Fig. 2, the filter unit 111 includes protective layers 22a and 22b disposed on both sides of the filtration layer 21; And an assembly layer 23 disposed under one protective layer 22a. The filtration layer 21 may be, for example, a microfine filter or a High Efficiency Particulate Air filter capable of filtration of fine particles having a diameter of 30 占 퐉. Depending on the filter design, the filter can be made of a multi-layer filter structure, and structures such as prefilters, intermediate filters and microfiber filters can be made. The size of the pores in the filtration layer 21 affects the discharge pressure of the circulating water, and if the pore size is smaller than the proposed diameter, the power consumption of the circulation pump can be drastically increased. The filtration layer 21 can be made of various materials such as nonwoven fabric, microfiber or carbon nanotube, and the present invention is not limited to the embodiments shown.

The protective layers 22a and 22b may be disposed on both sides of the filtration layer 21 so that the suspended solids adhered to the filtration layer 21 can be separated easily while the filtration layer 21 is fixed And the like. Specifically, the protective layers 22a and 22b can be made of a material having corrosion resistance, such as stainless steel, and can be made into a net structure. The net structure can be made, for example, to form a square through-hole by alternating the upper and lower sides of the string and the string, and the string and the string are arranged at the upper and lower sides of the intersection, And can be arranged to be different from each other. With this structure, the vibration of the protection layers 22a and 22b due to vortex generated in the rotation process of the suction nozzle unit 13a can be made possible. And the suspended solids can be easily separated from the filter unit 111 by the vibration of the protective layers 22a and 22b. The protective layers 22a, 22b can be made of various materials having strength and corrosion resistance, and the present invention is not limited to the embodiments shown.

The assembly layer 23 can be disposed under one protective layer 22a and can be made of a material such as, for example, a synthetic resin or a metal having corrosion resistance. And a collecting hole 231 may be formed in the collective layer 23. The collecting hole 231 may be formed to have a shape penetrating through the collective layer 23 and made larger in diameter than the diameter of the inlet face of the suction nozzle unit 13a. The water can be discharged through the collecting hole 231 and at the same time the floating solids can be accumulated in the collecting hole 231. The assembly hole 231 can be made to have a depth of, for example, 1 to 20 mm, but is not limited thereto. If the depth is smaller than the indicated value, the accumulation effect is insignificant. If the depth is larger than the indicated value, the suspended solids adhere to the circumferential surface of the collecting hole 231 and are difficult to be separated by the suction nozzle unit 13a.

The filter layer 21, the protective layers 22a and 22b, and the collective layer 23 are made of a single cylindrical unit and form the peripheral surface of the drum screen. Attachment and shaping of the filtration layer 21, the protective layers 22a, 22b and the collective layer 23 can be accomplished according to methods known in the art and the present invention is not limited to the embodiments shown.

2 (B), the suction nozzle unit 13a includes an extension tube 131 extending from the rotation axis; A suction nozzle 134 for collecting suspended solids; And an elastic connecting member 133 disposed between the extension tube 131 and the suction nozzle 134. A plurality of suction nozzle units 13a can be arranged on the rotary shaft, and each suction nozzle unit 13a can be made in the same or similar structure, and the suction nozzle units 13a adjacent to each other can be moved in the opposite direction Can be extended.

The extension tube 131 may be in the form of a hollow cylinder connected to the inside of the rotation shaft, and one end may be connected to the rotation shaft and the other end may be coupled to the elastic connection member 133. The elastic connecting member 133 can be made into a structure in which a circular elastic body is continuously disposed, and can be made in a structure that is stretched or contracted according to the inflow pressure. The inflow pressure refers to the pressure generated by the fluid or suspended solids flowing into the suction nozzle unit 13a. If the amount of the adhered solids accumulated in the filter unit 111 is small, the water inside the drum screen is quickly discharged to the outside, thereby reducing the pressure toward the inside of the suction nozzle unit 13a. In contrast, when a large amount of suspended solids is accumulated on the inner surface of the filter unit 111, the pressure applied by the suction pump becomes relatively large. The length of the elastic connecting member 133 can be changed in accordance with such a pressure change. Another function of the elastic connecting member 133 is to generate a vortex on the surface of the filter unit 111 while reducing the resistance to water during the rotation of the suction nozzle unit 13a so that the suspended solids can be easily separated.

The suction nozzle 134 is disposed at the other end of the elastic connecting member 133 so that the solid suspended matter accumulated on the inner surface of the filter unit 111 flows into the suction nozzle 134. As described above, the inlet face of the suction nozzle 134 can be made relatively large compared to the diameter of the extension tube 131 and can be made, for example, in the form of a funnel. And the end of the suction nozzle 134 may be adjacent to the surface of the filter unit 111 in a state in which the suction pump is not operated.

The suction nozzle unit 13a can be made in various structures suitable for collection of suspended solids attached to the surface of the filter unit 111, and the present invention is not limited to the embodiments shown.

3 shows another embodiment of the drum screen apparatus according to the present invention.

Referring to FIG. 3, a circulation pump 31 may be disposed in the inflow unit 14 for allowing water in a farm to flow into the interior of the filtration housing H. The water introduced into the filter housing H by the operation of the circulation pump 31 flows into the drum screen 11 and is discharged to the outside through the filter unit 111 and discharged to the outside through the discharge unit 15 . The inlet unit 14 can be disposed in front of the filtration housing H and the outlet unit 15 can be disposed under the filtration housing H and a plurality of discharge units 15 can be disposed in the filtration housing H As shown in FIG.

The rotary shaft 112 can be disposed along the longitudinal center of the cylindrical drum screen 11 and the rotary shaft 112 can be driven by the drive connection portion 17 formed at the end of the filtration housing H, (Not shown). The rotating shaft 112 can be rotated by the rotation of the driving motor 32 so that the suction nozzle units 13a to 13n arranged along the longitudinal direction of the rotating shaft 112 can be rotated. The suction nozzle 134 formed at the end of the suction nozzle units 13a to 13n may be in the form of a funnel and may be disposed adjacent to the filter unit 111. [ The suspended solids adhered to the filter unit 111 can be introduced into the suction nozzle units 13a to 13n and transferred along the rotating shaft 112 to be discharged to the outside through the suction conduit 331. [ And the suction pressure of the suction nozzle units 13a to 13n can be adjusted by the suction pump 33. [ If a large amount of suspended solids is accumulated on the inner surface of the filter unit 111, the pressure toward the inside of the suction nozzle units 13a to 13n relative to the suction pressure of the same suction pump 33 becomes relatively large . Therefore, the suction pump 33 can be actuated or the suction pressure can be adjusted according to the pressure of water discharged to the outside of the filter housing H or the pressure externally discharged to the outside of the drum screen 11. [ The pressure unit may be disposed, for example, on the outer surface of the discharge unit 15 or the drum screen 11.

The process of controlling the pressure of the suction pump 33 according to the discharge pressure will be described below.

4A and 4B illustrate an operation of the drum screen apparatus according to the present invention.

Referring to FIGS. 4A and 4B, the filtration method for filtering the water in the farm by the drum screen includes a step P41 of introducing the circulating water into the drum screen 11; (P42) in which the suspended solids are accumulated in the filter unit (111) in the course of the circulating water being introduced and discharged through the filter unit (111); A step P43 of measuring the discharge pressure of the discharge unit 15 or the drum screen 111; A step P44 of rotating the rotary shaft 112 by the actuation of the driving motor and thereby rotating the suction nozzle units 13a to 13n; A step P45 of determining the pressure of the suction pump 33 based on the measured discharge pressure; The suspended solids accumulated on the inner surface of the filter unit 111 are discharged in the form of wastewater through the suction nozzle unit 13a to 13n and the rotary shaft 113 through the suction conduit 331 in accordance with the operation of the suction pump 33 (P46); A step (P47) in which a change in the discharge pressure is measured; And a step P48 in which the operation level of the suction pump 33 is determined in accordance with the measured pressure change.

The inflow of the circulating water can be performed by the circulation pump and the circulating water can be introduced into the drum screen 11 installed inside the filtration housing H through the inflow unit 14 (P41). As the water is discharged from the inside of the drum screen 11 to the outside, the suspended solids can be accumulated on the inner surface of the filter unit 111 (P42) and the discharge pressure can be measured (P43). As the amount of suspended solids increases, the discharge pressure gradually decreases. When the discharge pressure reaches a certain level, the suction nozzle units 13a to 13n can be rotated by the operation of the drive motor (P44). And a vortex can be formed. As the rotary nozzle units 13a to 13n are rotated, the pressure of the suction pump 33 is determined according to the measured discharge pressure, so that the suction pump 33 can be operated (P45). The suspended solids can be discharged along the suction conduit 331 in the form of wastewater while the control valve 332 provided at the contact portion between the suction conduit 331 and the filtration housing H is opened (P46). When a certain level of wastewater is discharged, the discharge pressure is measured again to determine the change in discharge pressure. If the discharge pressure again rises to the predetermined value (YES), the suction pressure of the suction pump 33 may be decreased or the operation of the suction pump 33 may be stopped (P48) because the suspended solids are sufficiently collected. On the other hand, if the pressure change is not large (NO), the suction pressure is determined again and the operation of the suction pump can be continued (P45). When the operation of the suction pump 33 is stopped, the operation of the drive motor is interrupted and the control valve 332 can be closed. As described above, the operation state is determined according to the level of accumulation of the suspended solids of the drum screen according to the present invention, thereby reducing power consumption for filtration.

The drum screen device can be operated in various ways and the present invention is not limited to the embodiments shown.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: Drum screen device 11: Drum screen
13a to 13n: suction nozzle unit 14: inflow unit
15: exhaust unit 16: suction pump
17: drive connection part 21: filtration layer
22a, 22b: protective layer 23:
31: circulation pump 32: drive motor
33: Suction pump 111: Filter unit
112: rotation shaft 113: inlet hole
131: extension tube 133: elastic connection member
134: Suction nozzle 161:
231: Assembly hole 331: Suction conduit
332: Control valve H: Filtration housing

Claims

A drum screen (11) disposed inside the filtration housing (H) and having a circular filter unit (111) arranged therein;
At least one suction nozzle unit (13a to 13n) arranged in a direction perpendicular to a rotation axis (112) extending along the longitudinal direction of the drum screen (11);
An inlet unit (14) for introducing water containing suspended solids into the interior of the filtration housing (H);
A discharge unit (15) for discharging the water that has passed through the drum screen (11); And
And a suction pump (16) for applying a suction pressure to the suction nozzle units (13a to 13n)
The suction nozzle units 13a to 13n are rotated according to the rotation of the rotary shaft 112. Each of the suction nozzle units 13a to 13n includes an extension tube 131 extending from the rotary shaft. A suction nozzle 134 for collecting the floating material whose entrance surface is relatively larger than the diameter of the extension tube 131; And an elastic connecting member 133 which is disposed between the extension tube 131 and the suction nozzle 134 and which is formed by continuously arranging a circular elastic body and expanding and contracting in accordance with the pressure of the fluid, 21), the protective layer (22a, 22b) being formed in a net structure such that the cloth and the string are alternately arranged up and down; And an aggregate layer 23 disposed below the single protective layer 22a and having a larger diameter than the entrance surface of the nozzle units 13a to 13n and formed into a shape having a depth of 1 to 20 mm and passing therethrough Wherein the drum screen device has a vacuum suction structure.

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