JP2805740B2 - Dust removal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust removing device for removing dust from seawater or river water, and more particularly to a dust removing device for mitigating and improving a flow obstruction of a screen due to the attachment of dust to the screen.

[0002]

2. Description of the Related Art Conventionally, a dust removing device has been widely used in a water channel for taking cooling water such as an industrial water channel or a power plant. The most well-known type of dust remover is that a link chain is provided on both sides of the water channel, and a bar screen or a screen made of wire mesh is provided at each link of the link chain in a direction perpendicular to the water flow direction or at a predetermined inclination angle. And the screen is driven to rotate to remove dust adhering to the screen out of the water channel.

FIGS. 4 to 6 show examples of a conventional dust remover.
4 is an overall schematic view, FIG. 5 is a detailed vertical sectional view of a screen frame having a bucket portion, and FIG. 6 is a front view.

[0004] As shown in the figure, this dust removing device has an upper sprocket wheel 1 installed at the top of a water channel and a lower sprocket wheel 2 installed at the bottom of the water channel, and these are equipped with an endless link chain 3. It is suspended. The link chain 3 is provided with a screen frame 4 having a bucket portion for accommodating captured dust attached to a lower portion. The upper sprocket wheel 1 is rotated to move the screen frame 4 around, and a chain wheel 7 is connected via a transmission chain 6. In FIG. 4, reference numeral 8 denotes a shaft of the upper sprocket wheel 1 and 9 denotes a trough 10.
, A guide plate for guiding refuse, 11 a housing of the dust removing device, 12 a flowing water channel, and an arrow F indicates the direction of flowing water.

As shown in FIG. 5, the screen frame 4 is mounted at every pitch of the link chain 3, to which a screen body 14 composed of a plurality of bar members arranged in a wire mesh or plow shape is mounted. Have been. The screen main body 14 is a member facing the running water and blocking the flow of dust and the like in the running water to collect the collected dust, and then scoops the collected dust upward by driving the link chain 3. An upper beam 15 is provided at the upper end of the screen main body 14, and the upper beam 15 is formed of a pipe having a diameter suitable for the width of the water channel.
The mounting plate 1 is set so that its center is located at the center of the roller 3b of the link chain 3, and protrudes below it.
6, the screen main body 14 is integrally fixed.

A lower beam 17 having a U-shaped cross section is provided at the lower end of the screen main body 14, and the lower beam 17 is rotatable above the upper beam 15 of the screen frame 4 adjacent to the lower portion. The screen main body 14 is integrally fixed via a mounting plate 18 provided so as to cover and protruding from the upper part thereof.

A side plate 19 for holding the side edge is provided at a side edge of the screen body 14, and this side plate 19 has a width wider than the link width of the link chain 3 as shown in FIG. The upper beam 15 and the lower beam 17 are integrally fixed to left and right end surfaces, respectively. In other words, the side plate 19 and the upper beam 15 and the lower beam 17
Thus, a frame (screen frame 4) for holding the screen main body 14 is formed. Further, the side plate 19 extends to the bucket 21 described later and is joined to both ends of the bucket 21. The screen frame 4 is attached to the link chain 3 by fixing the side plate 19 to the side surface of the link 3a with bolts 20. A dust bucket 21 is provided on the lower beam 17 so as to obliquely cover the lower front of the screen main body 14, and the left and right ends thereof are integrally fixed to the projecting portion of the side plate 19. I have.

In FIG. 4, reference numeral 23 denotes a backwashing spray pipe disposed on the back side of the screen main body 14 which has been turned upside down through the upper sprocket wheel 1, and sprays spray water onto the back surface of the screen main body 14. By doing so, the attached dust is removed and removed.

According to such a dust removing device, the dust and the like floating in the flow are first blocked by the screen main body 14 and scooped up by the dust bucket 21 as the link chain 3 rises. Then, the ascending wheel 1 is turned upside down. As a result, the dust remaining in the dust bucket 21 falls and is discharged to the trough 10 via the inclined surface of the dust bucket 21 and the guide plate 9.

[0010]

By the way, in recent years, the width of a water channel has been widened with an increase in water intake, while the amount of dust floating in the water channel has tended to increase. In the case of flooding, the processing capacity of the installed dust remover is exceeded, the dust cannot be completely processed, and the screen main body 14 gradually closes, and eventually it becomes impossible to secure sufficient water flow. Caused a sudden rise in the water level difference. The processing capacity of the dust remover is determined by the volume of dust that can be scraped up by the volume of the screen body 14 and the dust bucket 21 and the operation speed thereof.
The actual situation is that, before reaching the capacity, an abnormal water level difference occurs on the screen due to water flow obstruction due to clogging of the screen, causing the screen to be inoperable.

For this reason, when the water level difference between before and after the dust remover exceeds a certain value, the flowing water pressure applied to the screen main body 14 and the screen frame 4 becomes excessively large. I was taking action. However, when such a situation occurs during the power demand period, there is a problem that the power supply at the power plant cannot keep up with the demand, and a power outage causes a serious public abnormal situation.

The present invention focuses on the above-mentioned conventional problems, and reduces the load on the dust removing device of the main body when a large amount of water is introduced into the water basin, thereby ensuring that the water level difference before and after the dust removing device does not become unusually large. It is an object of the present invention to provide a dust-removing facility capable of continuing the operation.

[0013]

Means for Solving the Problems In order to solve the above-mentioned problems, a dust removing apparatus of the present invention is a dust removing apparatus comprising a dust removing device provided in a water channel and a gate installed upstream of the water channel of the dust removing device. The gate has a double-opened shape that opens to the downstream side, and the door surface is formed by a perforated flat plate. The dust removing device includes a screen frame provided with an endless link chain and a screen for collecting dust. A pair of left and right perforated flat plates or a pair of left and right perforated flat plates which are vertically attached parallel to the water channel or provided in the shape of a U-shape toward the downstream side are provided in the screen frame. And an electric motor driven through a sprocket wheel.

[0014]

In the dust removing equipment of the present invention, in a normal time when the inflow of dust is relatively small, dust is collected by the dust removing device while the gate is kept fully open. On the other hand, when there is an abnormal situation where a large amount of dust, such as a water carrier, flows in, the gate is kept half-open to allow the large amount of dust to flow mainly through the center of the waterway and into the dust removal device. Even if flooding occurs, the water is mainly collected near the center of the screen frame and the inflow of dust is small near both ends of the screen frame. Therefore, the flowing water mainly flows through this portion, so that the water level difference generated before and after the dust removing device is not so large. The perforated flat plate provided on the screen frame functions as a weir to prevent dust collected at the center of the screen frame from moving to both sides together with running water.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a dust removing apparatus according to an embodiment of the present invention. The dust removal equipment of the present invention
It is composed of a dust remover and a gate installed upstream of the water channel of the dust remover. 1 to 3 relate to an embodiment of the present invention, and FIG. 1 is an overall plan view of a dust removing apparatus showing an operation state at a normal time.
FIG. 2 is an overall plan view of the dust removing equipment and shows an operation state when an abnormality occurs. FIG. 3 is a perspective view of a main part of a screen frame of the dust removing device. In the figure, reference numeral 100 denotes a dust remover, 200 denotes a gate, and a gate 200 is installed in front of a water channel of the dust remover 100, and is a double-opening (double door) door plate which can be freely opened and closed by a hinge or the like on columns 210, 210 on both inner walls of the water channel. 230, 230 are provided. The door plate 230 has a screen frame 4 of the dust removal apparatus 100.
A plurality of through-holes 230a that are about 2 to 5 times larger than the opening of the screen 14 are formed on the entire surface. On the other hand, the dust removing device 100 has substantially the same structure as that described in the related art, and a pair of left and right perforated flat plates 30 and 30 is provided inside the screen frame 4 as shown in FIG. It is vertically installed in the shape of a C-shape close to each other toward the downstream of the waterway. The perforated plate 30 may be parallel to the water channel. The diameter of the through-holes 30 a of the perforated flat plate 30 may be approximately the same as the mesh of the screen 14.

The operation of the dust removing equipment of the present invention configured as described above will be described. In the normal operation in which the amount of dust is relatively small, as shown in FIG. 1, the gate 200 is fully opened, and all the running water in the water channel is treated by the dust removing device 100 to collect the dust and discharge the dust from the water channel. As shown in Fig. 2, when a large amount of trash such as a water carrier flows in,
00 is held in a half-open state.
In this way, the refuse flowing from the upstream of the water channel 12 is guided by the half-open door plate 230 and flows intensively into the center of the water channel. Therefore, the dust is gathered in the center at the center of the screen frame 4 of the dust removing apparatus 100 that treats these dusts, and the screen frame 14 circulates at the edges of both sides with relatively little dust. Therefore, running water mainly flows to both sides, which alleviates water flow obstruction. A pair of left and right perforated flat plates 30, 30 provided on the screen frame 4 has a function of preventing the dust in the center, which has been once collected by the screen frame 4, from laterally moving to both sides and covering the edge screen surface. I do. In order to hold the gate 200 in a half-open state, it is only necessary to connect a cord between the upper edge of the door plate 230 and the support on the opposite shore. In short, the difference in water level before and after the dust removal device becomes unusually large because the dust that flows in the entire screen surface is covered and the passage area of the running water is lost, and the present invention is to secure the flowing water passage area. is there.

As described above, the dust removing equipment of the present invention is provided with the double-opening gate 200 which is opened at the upstream side of the water channel of the dust removing device 100 at the downstream side and guides a large amount of dust flowing along with the running water in the case of abnormality. Dust removal device 1 installed in the center
Since the central processing of the central portion of the screen frame 4 is performed in a centralized manner, the uniform load of the entire screen of the screen frame is centralized and the passage of flowing water can be facilitated.

[0018]

As described above, in the dust removing equipment according to the present invention, it is possible to suppress an increase in the water level difference between before and after the dust removing device even at the time of abnormal occurrence of a large amount of dust such as a water carrier. Therefore, stable continuous operation is possible without applying excessive force to the equipment to cause damage or shorten the life of the equipment, thereby improving the maintainability.

[Brief description of the drawings]

FIG. 1 is an overall plan view showing a normal operation state of a dust removal facility according to an embodiment of the present invention.

FIG. 2 is an overall plan view showing an operation state of the dust removing facility according to the embodiment of the present invention when an abnormality occurs.

FIG. 3 is a perspective view of a main part of a screen frame of the dust removing apparatus according to the embodiment of the present invention.

FIG. 4 is an overall vertical sectional view of a conventional dust removing device.

FIG. 5 is a longitudinal sectional view of a main part of a conventional dust removing device.

FIG. 6 is a front view of a conventional dust removing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper sprocket wheel 2 Lower sprocket wheel 3 Link chain 4 Screen frame 12 Waterway 15 Upper beam 17 Lower beam 19 Side plate 30 Perforated flat plate 100 Dedusting device 200 Gate 210 Support column 220 Hinge 230 Door plate 230a Through hole F Flowing direction of flowing water L Screen frame traveling direction

Claims (1)

(57) [Claims] 1. A dust removing device comprising a dust removing device provided in a water channel and a gate installed upstream of the water channel of the dust removing device, wherein the gate has a double-opened shape opened to the downstream side, and
The door surface is formed of a perforated flat plate, and the dust removing device is composed of an endless link chain and a screen frame provided with a screen for collecting dust, and a pair of right and left vertically suspended parallel to the water channel inside the screen frame. A dust removing facility comprising: a perforated flat plate or a pair of left and right perforated flat plates approaching in a C shape toward the downstream side, and a motor for driving the link chain via a pair of upper and lower sprocket wheels.