KR100825981B1 - Screen apparatus for debris filter system - Google Patents

Abstract

A screen apparatus for a debris filter system is provided to remove fibrous particles or flat particles effectively, thereby suppressing excessive differential pressure and the damage of the debris filter system due to presence of the particles. Division plates(20) are continuously installed in a moving direction of a back wash rotor(2) while the division plates are distanced from each other. A screen plate(30) has holes(35) to which the division plates are joined. Each of the division plates includes an inside end(22) adjacent to an end of the back wash rotor, and an outside end(24) extended from the inside end in a direction away from the end of the back wash rotor. The screen plate is joined to the outside end of the division plate so that a space(S) from the inside end of the division plate to the screen plate is formed between adjacent division plates. Further, a distance between the adjacent division plates is shorter than a width of an end of the back wash rotor.

Description

Screen device for Debris filter system {SCREEN APPARATUS FOR DEBRIS FILTER SYSTEM}

The present invention relates to a screen apparatus for a debris filter system, and more particularly to a screen apparatus for a debris filter system used to remove foreign substances such as dirt and shellfish of seawater used as cooling water in a power generation facility. It is about.

In general, debris filter system removes foreign substances such as dirt and shellfish in seawater when seawater used as cooling water in power generation facilities, and prevents damage to power generation facilities caused by inclusion of foreign matter in cooling water. . For example, seawater used as cooling water in a thermal power plant primarily removes dirt or shellfish suspended in the seawater through a coarse screen, and foreign matters not removed from the coarse screen are discharged from the circulating water pump and the condenser inlet. Finally removed by a debris filter system installed in between.

1 is a view for schematically explaining a debris filter system, FIG. 2 is a perspective view showing a screen apparatus for a debris filter system according to the related art in the debris filter system shown in FIG. 1, and FIG. FIG. 6 is a view illustrating a problem of a screen device for a debris filter system according to the related art.

Referring to FIG. 1, a general debris filter system 1 passes seawater A supplied by a circulating water pump (not shown) through a screen device 500 according to the prior art, and this screen device 500 is provided. The foreign matter filtered by is discharged to the outside through a back wash rotor (2). As such, the seawater filtered through the screen device 500 is supplied to a condenser (B) for use as cooling water. At this time, a vacuum suction type discharge device 3 is connected to the back wash rotor 2.

The operating principle of the debris filter system 1 is that when the screen device 500 is filled with foreign matter, the pressure difference before and after the screen device 500 increases, and this differential pressure measurement device detects the backwash rotor. (2) and discharge the foreign matter into the discharge tunnel (not shown) by causing the seawater and foreign matter to be sucked (back wash) into the backwash rotor (2) by the operation of the discharge device (3). Let's go.

In this case, referring to FIG. 2, the screen device 500 according to the related art is configured by attaching a screen plate 520 having a perforation 522 formed on a hemispherical frame 510.

However, the screen device 500 according to the related art has a problem in that it is not possible to effectively deal with foreign matters due to the increase of garbage such as vinyl and clothes. In particular, such problems are frequently encountered in power plants that take in seawater from the sea in close proximity to the city. That is, as shown in Figure 3, the fibrous or flat foreign matter (C) during the filtration of sea water is in close contact with the screen plate 520 of the screen device 500 is no back wash. In addition, a rubber contact bar 5 is installed at the end of the back wash rotor 2, and due to the machining and assembly errors of the frame 510 and the screen plate 520, the contact bar 5 and the screen plate ( There is a problem that it is difficult to keep the interval between the 520 constant. At this time, when the distance between the contact bar 5 and the screen plate 520 is larger than the proper interval (typically, about 10mm), the seawater that is backwashed is not effectively introduced into the backwash rotor 2, and the distance is relatively As small as it can increase the effect of the back wash, but foreign matter acts as a barrier to the back wash rotor (2) has a problem that the differential pressure is increased by increasing the foreign matter that is not released eventually.

Accordingly, the present invention has been proposed to solve the problems of the prior art, and to provide a screen device for a new type of debris filter system that can stably handle fibrous or flat foreign matter. The purpose.

In addition, the fluid (sea water) to be backwashed by the backwash rotor 2 is maintained by maintaining a constant gap between the rubber contact bar 5 and the screen plate 520 at the end of the backwash rotor 2. It is an object of the present invention to provide a screen device for a new type of debris filter system of a new type which can be effectively introduced into and minimized the occurrence of differential pressure.

In addition, the present invention enables to maintain the normal debris filter system through the exchange of the screen device 500 according to the prior art, thereby enabling effective operation without replacing the equipment to reduce the maintenance cost of the equipment It is an object of the present invention to provide a screen device for a new type of debris filter system.

According to a feature of the present invention for achieving the above object, the present invention allows the fluid to be filtered through the screen device, the backwash is installed in the direction in which the fluid is introduced into the screen device to filter the foreign matter filtered by the screen device A screen device for a debris filter system for suction and removal by a rotor (2), comprising: a split plate (20) which is continuously spaced apart from each other in a moving direction (D) of the back wash rotor (2); Perforations 35 are formed to include a screen plate 30 coupled to the split plate 20; The dividing plate 20 has a constant length L from the inner end 22 in a direction away from the inner end 22 of the back wash rotor 2 and the end of the back wash rotor 2. And the screen plate 30 is coupled to the outer end 24 side of the split plate 20 so that the split plate 20 on both sides disposed in close proximity to each other. Between the spaced apart from each other so that the retention space (S) from the inner end 22 of the split plate 20 to the screen plate 30 is formed.

In the screen device for the debris filter system according to the present invention, the screen plate 30 may be formed to have a curvature between the split plate 20 on both sides disposed in close proximity to each other.

In the screen device for the debris filter system according to the present invention, the separation distance of the split plates 20 on both sides disposed in close proximity to each other may be smaller than the width of the end of the back wash rotor 2.

According to another feature of the present invention for achieving the above object, the present invention allows the seawater taken from the ocean to be filtered through the semi-cylindrical screen device for use as the cooling water of the power plant, the foreign matter filtered by the screen device In the screen device for the debris filter system is installed in the direction in which the sea water is introduced into the screen device to remove the suction by the back wash rotor (2), the frame 12 is formed in a semicircle and arranged on both sides )and; Both sides in the longitudinal direction are respectively coupled to the frame 12 by being formed into a flat plate, and have an outer end 24 extending in the width direction from the inner end 22 and the inner end 22 to have a constant length. A partitioning plate 20 continuously spaced apart from each other in a moving direction D of the back wash rotor 2 while the inner end 22 faces the back wash rotor 2; A screen plate having coupling portions 32 respectively coupled to the split plates 20 on both sides disposed in close proximity to each other, and having mesh portions 34 formed with perforations 35 between the coupling portions 32 on both sides. Including (30); The screen plate 30 is coupled to the outer end 24 side of the dividing plate 20, so that the screen plates 30 are spaced apart from each other of the dividing plates 20 arranged in close proximity to each other. The residence space S from the inner end 22 to the mesh portion 34 of the screen plate 30 is formed.

In the screen device for the debris filter system according to the present invention, the mesh portion 34 of the screen plate 30 may be formed to have a convex curvature to the inner end 22 of the split plate 20.

In the screen device for the debris filter system according to the present invention, the dividing plate 20 further includes an auxiliary end 26 formed to protrude in the direction of the retention space S from the inner end 22 side. Thus, the separation distance of the split plate 20 on both sides disposed in close proximity to each other may be smaller than the width of the end of the back wash rotor (2).

According to the screen device for the debris filter system according to the present invention, the backwash by installing the screen plate 30 so as to be located on the opposite side of the end of the back wash rotor (2) in the divided plate 20 is continuously spaced apart Since the retention space (S) is formed in the front end of the rotor (2) to effectively operate the suction force, it is possible to stably handle the fibrous or flat foreign matter. In addition, since the distance from the contact bar 5 of the back washer rotor 2 is set by the split plate 20 formed of a rigid material such as an iron plate, the contact bar 5 and the screen of the back washer rotor 2 are screened. Since the gap between the plates 520 can be kept constant, the backwashed seawater (fluid) is effectively introduced into the backwash rotor 2, and the accumulation of foreign matter is minimized to minimize the occurrence of differential pressure. In particular, according to the present invention, since the mesh portion 34 formed with the perforation 35 through which seawater passes can be configured to have a curvature, the degree to which the fibrous or flat foreign matter adheres to the mesh portion 34 can be lowered. Since many perforations 35 can be applied, overload can be further reduced. In addition, according to the present invention, it is possible to maintain the normal debris filter system through the exchange of the screen device 500 according to the prior art, thereby reducing the maintenance cost of the equipment to enable effective operation without replacement of equipment You can.

4 is a view for explaining a screen device for a debris filter system according to the technical spirit of the present invention.

Referring to FIG. 4, the screen device 10 (hereinafter, referred to as a “screen device”) for the debris filter system according to the present invention includes a split plate 20 and a screen plate 30, so that fluid may be formed. Debris to be filtered through the screen device 10, the foreign matter filtered by the screen device 10 to remove the suction by the back wash rotor (2) installed in the direction in which the fluid flows into the screen device (10) It is installed and used in the filter system 1 (refer FIG. 1).

As shown with reference to Figure 1, the debris filter system 10 is used for the purpose of filtration of the fluid to remove foreign matter, such as dirt, shellfish and the like in the seawater withdrawal of seawater used as cooling water in the power plant. Therefore, in the present invention, the seawater filtration, which is the main use of the debris filter system 10, will be described as an example, but the screen device 10 may be used for various purposes to filter foreign substances from various types of fluids as well as seawater. It is.

Again, referring to FIG. 4, the screen device 10 according to the present invention is provided with the screen plate 30 so as to be located on the opposite side of the end of the back wash rotor 2 to the partition plate 20 continuously installed. Thus, the retention space (S) for the suction force is effectively applied to the front end of the back wash rotor (2) to effectively treat the fibrous or flat foreign matter.

In the screen device 10, the dividing plates 20 are continuously spaced apart from each other in the moving direction D of the back washer rotor 2. Such a dividing plate 20 is formed of the back washer rotor 2. And an inner end 22 proximate the end and an outer end 24 extending from the inner end 22 to a predetermined length L in a direction away from the end of the back washer rotor 2. In addition, the screen plate 30 is formed with a perforation 35 is coupled to the split plate 20, it is coupled to the outer end 24 side of the split plate 20.

Through the configuration of the split plate 20 and the screen plate 30 as described above, the screen device 10 according to the present invention is the partition plate 20 between the spaced apart from each other of the split plate 20 disposed in close proximity to each other Since the residence space (S) from the inner end 22 of the screen plate 30 to be formed, the foreign matter is concentrated in the retention space (S) can be more effectively treated, foreign matter of the flat plate, such as vinyl screen Even when attached to the plate 30, since it is easily separated from the screen plate 30 by seawater sucked into the back wash rotor 2 (back wash), it is possible to effectively deal with foreign matter. For example, as shown in FIG. 3, according to the prior art, due to the minute spacing between the contact bar 5 of the back wash rotor 2 and the screen plate 520 of the screen device 500, While the foreign matter of a flat plate such as vinyl is pressed against the contact bar 5 and is not effectively sucked into the back washer rotor 2, the screen device 500 according to the present invention has a screen plate 520 and a back washer rotor 2. Since the contact bar 5 of) becomes a shape arranged with the retention space S interposed therebetween, foreign matter that comes into close contact with the screen plate 520 during the action of the backwash can be effectively removed.

In addition, since the screen device 10 according to the present invention is set to the gap with the contact bar 5 of the back wash rotor 2 by the partition plate 20 formed of a rigid material such as iron plate processing and assembly tolerance By changing the gap between the contact bar 5 and the screen plate 520 of the back wash rotor (2) by so that the suction of foreign matters is made more stable.

At this time, the movement direction (D) of the back wash rotor (2) in the present invention refers to the direction in which the end of the back wash rotor (2) is moved in order to suck the foreign matter caught by the screen plate (20). In addition, in the preferred embodiment of the present invention, in consideration of the fact that the back wash rotor 2 is configured to semi-circular motion by a motor (not shown), the screen device 10 is formed as a semi-cylindrical example, The structure of the same screen device 10 is formed to correspond to the movement type (driving type) of the back wash rotor 2. That is, the screen device 10 according to the present invention has a fluid under the technical concept of the present invention, in which the partition plate 20 forms a partition-type staying space S in the movement direction D of the back wash rotor 2. It can be configured in various forms according to the movement form of the back wash rotor (2) installed in the inflow direction.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 5 to 7, and like reference numerals refer to like elements in FIGS. 4 to 7. Meanwhile, the drawings and detailed descriptions of configurations, operations, and effects that can be easily understood by those skilled in the art from general technology in each drawing are briefly or omitted, and are illustrated based on parts related to the present invention.

FIG. 5 is a perspective view illustrating a screen device for a debris filter system according to a preferred embodiment of the present invention, and FIGS. 6A and 6B illustrate a coupling relationship of main elements of the screen device for a debris filter system shown in FIG. 5. 7 is a cross-sectional view of a screen device for the debris filter system shown in FIG.

5 to 7, a screen device 10 according to a preferred embodiment of the present invention includes a frame 12, a split plate 20, and a screen plate 30. Since it is installed in the debris filter system which is installed in the direction in which the seawater flows and is formed in a semi-cylindrical shape so as to correspond to the moving direction (D, see FIG. 4) of the back wash rotor 2 which is rotated by a motor (not shown), It will function to filter seawater taken from the ocean for use as cooling water in power plants.

At this time, the frame 12 is formed in a semicircular shape and disposed on both sides. Such a frame 12 is an element fixed to the system when the screen device 10 is installed in the debris filter system. In this embodiment, the bolt hole is provided to provide convenience of maintenance by replacing the screen device according to the prior art. The position of (13) is formed in the same manner. Of course, such a frame 12 is configured to support the split plate 20 and the screen plate 30, and those skilled in the art can be configured in various ways as needed.

As shown in FIG. 6B, the split plate 20 is formed into a flat plate, and thus both sides in the longitudinal direction are respectively coupled to the frame 12 by a fixing method such as welding. And it has an inner end 22 in the width direction, and the outer end 24 extended so that it may have a fixed length from this inner end 22. As shown in FIG. As shown in FIG. 7, the dividing plates 20 are continuously spaced apart from each other in the moving direction D of the back washer rotor 2 while the inner end 22 faces the back washer rotor 2. Is installed.

On the other hand, the split plate 20 of the screen device 10 according to the present embodiment is further provided with an auxiliary end 26 formed to protrude in the direction of the retention space (S) from the inner end 22 side, close to each other The suction force to the back washer rotor 2 acts effectively by making the separation distance of the split plates 20 on both sides arranged so that the separation distance is narrower than the width of the end of the back washer rotor 2 (referring to the contact bar 5). Be sure to

The screen plate 30 of the screen device 10 according to the present embodiment has coupling portions 32 respectively coupled to the split plates 20 on both sides disposed in close proximity to each other, and between coupling portions 32 on both sides. It is provided with a mesh portion 34 is formed a perforation (35). As shown in FIG. 7, the screen plate 30 is coupled to the outer end 24 side of the dividing plate 20, so that the screen plates 30 are spaced apart from each other on both sides of the dividing plate 20 arranged in close proximity to each other. The residence space S from the inner end 22 of the dividing plate 20 to the mesh portion 34 of the screen plate 30 is formed. The coupling of the screen plate 30 and the split plate 20 may be applied to various fastening structures known in the art. In this embodiment, the bolt plate 25 is formed in the split plate 20, and the screen plate ( A bolt hole 33 was formed in the coupling portion 32 of 30 to be coupled with a bolt and a nut.

As such, the configuration in which the screen plate 30 is coupled between the split plates 20 provides convenience of maintenance. That is, the screen device 500 (refer to FIGS. 2 and 3) according to the related art uses the screen plate 520 integrally formed over the whole, so that when the part is damaged, the whole needs to be replaced. According to the screen plate 30 is configured to be separately formed and coupled between the split plate 20, partial exchange is possible.

In addition, the screen plate 30 according to the present embodiment is formed so that the mesh portion 34 has a curvature convex to the inner end 22 of the split plate 20. Such a configuration can lower the degree of fibrous or flat foreign matter being in close contact with the mesh portion 34, and can further reduce overload because more pores 35 can be applied.

As described above, the screen device for the debris filter system according to a preferred embodiment of the present invention has been shown in accordance with the above description and drawings, but this is merely an example and is within the scope without departing from the spirit of the present invention. It will be understood by those skilled in the art that various changes and modifications can be made in the art.

1 is a view for schematically explaining a debris filter system;

FIG. 2 is a perspective view showing a screen device for the debris filter system according to the prior art in the debris filter system shown in FIG. 1; FIG.

3 is a view for explaining the problem of the screen device for the debris filter system according to the prior art shown in FIG.

4 is a view for explaining a screen apparatus for a debris filter system according to the spirit of the present invention;

5 is a perspective view for explaining a screen device for a debris filter system according to a preferred embodiment of the present invention;

6a and 6b are views for explaining the coupling relationship of the main elements of the screen device for the debris filter system shown in FIG.

7 is a cross-sectional view of the screen device for the debris filter system shown in FIG.

Explanation of symbols on the main parts of the drawings

2: backwash rotor

10: Screen device (for Debris filter system)

12: frame

20: split plate

22: inner end

24: outer end

26: assistant

30: screen plate

32: coupling part

34: net

35: perforation

S: residence space

D: Movement route

Claims (6)

A screen for a debris filter system that allows fluid to be filtered through a screen device but allows suction and removal of foreign matter filtered by the screen device into a back wash rotor (2) installed in a direction in which fluid flows into the screen device. In the apparatus, A partition plate 20 continuously spaced apart from each other in a moving direction D of the back wash rotor 2; Perforations 35 are formed to include a screen plate 30 coupled to the split plate 20; The splitter plate 20 has an inner end 22 proximate to the end of the back wash rotor 2, An outer end 24 extending from the inner end 22 to a predetermined length L in a direction away from the end of the back wash rotor 2, The screen plate 30 is coupled to the outer end 24 side of the dividing plate 20, so that the split plate 20 is spaced apart from each other of the dividing plates 20 on both sides disposed in close proximity to each other. Screen device for the debris filter system, characterized in that the residence space (S) from the inner end (22) to the screen plate (30) is formed. The method of claim 1, The screen plate (30) is a screen device for the debris filter system, characterized in that it is formed to have a curvature between the split plate (20) on both sides disposed in close proximity to each other. The method according to claim 1 or 2, Screening device for a debris filter system, characterized in that the separation distance of the split plate (20) on both sides disposed in close proximity to each other is smaller than the width of the end of the back wash rotor (2). The backwash is installed so that the seawater taken from the ocean for use as cooling water of the power plant is filtered through a semi-cylindrical screen device, and the foreign substances filtered by the screen device are installed in the direction in which the seawater flows into the screen device. In the screen device for the debris filter system for suction and removal by the rotor (2), A frame 12 formed in a semicircle and disposed at both sides; Both sides in the longitudinal direction are respectively coupled to the frame 12 by being formed into a flat plate, and have an outer end 24 extending in the width direction from the inner end 22 and the inner end 22 to have a constant length. A partitioning plate 20 continuously spaced apart from each other in a moving direction D of the back wash rotor 2 while the inner end 22 faces the back wash rotor 2; A screen plate having coupling portions 32 respectively coupled to the split plates 20 on both sides disposed in close proximity to each other, and having mesh portions 34 formed with perforations 35 between the coupling portions 32 on both sides. Including (30); The screen plate 30 is coupled to the outer end 24 side of the dividing plate 20, so that the screen plates 30 are spaced apart from each other of the dividing plates 20 arranged in close proximity to each other. Screen device for a debris filter system, characterized in that the retention space (S) from the inner end (22) to the mesh portion (34) of the screen plate (30) is formed. The method of claim 4, wherein The screen portion (34) of the screen plate (30) is a screen device for the debris filter system, characterized in that formed in the convex curvature to the inner end (22) of the split plate (20). The method according to claim 4 or 5, The dividing plate 20 further includes an auxiliary end 26 protruding from the inner end 22 side in the direction of the staying space S, and the dividing plates 20 are disposed adjacent to each other. Screening device for the debris filter system, characterized in that the separation distance of the narrower than the width of the end of the back wash rotor (2).

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