JP5384035B2 - Scum remover - Google Patents

Description

  The present invention relates to a scum removing device that is provided in a final sedimentation basin or the like of a sewage treatment plant and removes scum floating on the water surface.

  The pipe skimmer method can be cited as a scum removal device that is widely used in sewage treatment plants. Generally, the scum is scraped to the pipe skimmer using the return flight on the water surface of the flight-type sludge scraper. The scum inlet formed on the peripheral surface of the scum is made to overflow into the pipe together with water and discharged out of the tank, and one conventional example is described in Patent Document 1.

This document relates to a technology that includes a scum pan that guides the scum transferred by return flight to a pipe skimmer, and links the scum pan and the pipe skimmer by a wire rope. One end of the wire rope is wound around the pipe skimmer, and the other end is attached to the upstream end side of the scum pan via a sheave wheel. When the scum inlet of the pipe skimmer moves in the water surface direction, the wire rope is wound As a result, the upstream end side of the scum pan is lifted from the water surface, and the scum flows toward the scum inlet.
Japanese Utility Model Publication No. 2-121180

  In the structure of Patent Document 1, a pipe skimmer and a scum pan are connected by a wire rope. Since a large gap is formed between the pipe skimmer and the scum pan, this is separate from the raw water collected by the scum pan. The raw water flows into the scum inlet from below through the gap.

  Since the scum and raw water collected by the pipe skimmer are discharged out of the tank and sent to the next water treatment step, the flow of the raw water from the gap gives an extra load to the next water treatment step.

  The present invention was created to solve the above problems, and an object of the present invention is to provide a scum removing device that can flow only scum collected by a scum pan and raw water near the water surface to a pipe skimmer. It is said.

In order to solve the above problems, the present invention provides a pipe skimmer that is rotatably provided so that the scum inlet of the circumferential surface moves between a water surface upper position and a water surface position, and one end is located on the pipe skimmer side, When the scum inlet is at a position above the water surface, the other end is submerged, and when the scum inlet is at the water surface, the other end is lifted from the water surface so that the scum flows into the scum inlet. A scum removing device, wherein one end of the scum pan is pivotally connected to an outer peripheral surface of the pipe skimmer, and the scum pan is slidable on a pan support provided in the tank. And swinging with the upper end of the pan support portion as a swinging fulcrum .

  According to this scum removing device, since one end of the scum pan is rotatably connected to the outer peripheral surface of the pipe skimmer, there is almost no gap between the pipe skimmer and the scum pan, and therefore the other end of the scum pan is lifted. Only the scum collected by the above and the raw water near the water surface can flow from the scum inlet to the inside of the pipe skimmer. As a result, quantitative discharge to the outside of the tank becomes possible, and a load in the next water treatment process is reduced at a sewage treatment plant or the like.

And according to the scum removing apparatus, in accordance with the rotation of the connecting portion of the pipe skimmer and Sukamupan, since Sukamupan swings while sliding at the top of the pan supporting unit, the oscillation of Sukamupan a simple structure Can be achieved. Assembly is simple and can be easily applied to existing pipe skimmer equipment.

According to the present invention, scum and raw water can be discharged quantitatively outside the tank, and a load in the next water treatment process is reduced at a sewage treatment plant or the like.
Moreover, since it is a simple structure, it can be easily applied to existing pipe skimmer equipment.

  Embodiments of the invention will be described with reference to the drawings. FIGS. 1 and 2 are side explanatory views of the scum removing device according to the present invention. FIG. 1 shows a state in which the scum inlet is at a position above the water surface, and FIG. 2 shows a state in which the scum inlet is at the water surface position. . The means for transferring the scum toward the pipe skimmer is not particularly limited in the present invention, for example, using a return flight of a flight-type sludge scraper, and illustration thereof is omitted.

  The scum removing device 1 according to the present invention is installed in a treatment tank such as a sedimentation basin of a sewage treatment plant, for example, and the scum inlet 2 on the circumferential surface is located above the water surface shown in FIG. 1 and shown in FIG. FIG. 1 shows a pipe skimmer 3 which is pivotably provided so as to move over the water surface position, and one end (downstream end portion) located on the pipe skimmer 3 side and the scum inlet 2 is located above the water surface. When the other end (upstream end portion) is submerged and the scum inlet 2 reaches the water surface position, the other end (upstream end portion) is lifted from the water surface as shown in FIG. And a scum pan 4 which is provided so as to be swingable so as to flow. The scum inlet 2 is formed as a rectangular opening that is long in the axial direction of the pipe skimmer 3. In general, the opening width dimension (dimension in the back-front direction in FIG. 1) is smaller than the width dimension of the treatment tank.

  On the outer peripheral surface of the pipe skimmer 3, for example, a bracket 5 having a long hole 5A is fixed. The elevator 7 is installed in the upper part of the tank, for example, the frame ceiling part R, and the pin 6A at the lower end of the suspended lift bar 6 is engaged with the long hole 5A. Thereby, the pipe skimmer 3 rotates about the horizontal axis X by the raising / lowering operation of the raising / lowering bar 6.

  One end of the scum pan 4 is rotatably connected to the outer peripheral surface of the pipe skimmer 3. 1 and 2 show a mode using a general-purpose hinge 9 as a connecting structure. One blade surface is fixed to an edge of one end of the scum pan 4 and the other blade surface is formed by a curved surface of the pipe skimmer 3. It fixes to the pipe skimmer 3 via the attachment seat 8 with respect to an outer peripheral surface. In addition to being fixed to the pipe skimmer 3 by welding or the like, the mounting seat 8 is fixed to the pipe skimmer 3 by fastening with a fixing screw for a hinge 9, for example. The mounting seat 8 is configured, for example, as a member extending in the axial direction of the pipe skimmer 3 so that no gap is generated between the outer peripheral surface of the pipe skimmer 3 and one end of the scum pan 4.

  The scum pan 4 is a flat plate-like member having a rectangular shape in plan view, and is composed of a steel plate or the like. In the illustrated example, one end and the other end are bent upward. At each side edge of the scum pan 4 (each edge in the direction from the back to the front in FIG. 1), a side plate 4A for preventing the raw water from flowing in and out from the lateral direction is formed upright. The downstream end edge of the side plate 4 </ b> A rises as a concave arcuate surface 4 </ b> B having substantially the same radius of curvature as the outer diameter of the pipe skimmer 3. The middle bottom surface of the scum pan 4 is slidably mounted on the pan support portion 11. Although the figure shows the case where the bread support 11 is protruded from the chassis bottom W that is locally raised to the vicinity of the water surface, the formation of the bread support 11 is not limited to this, and a sedimentation basin or the like It can also be formed so that the bread support part 11 spans from one side wall of the tank to the other side wall.

  The operation of the present invention will be described. When the scum inlet 2 of the pipe skimmer 3 is at a position above the water surface as shown in FIG. 1, the scum pan 4 is almost entirely submerged and placed on the pan support 11. Has been. On the surface of the water, the scum is transferred to above the scum pan 4 by a scum transfer means (not shown) such as a return flight of a flight type sludge scraper.

  When the elevator 7 is driven to raise the elevator bar 6 and the pipe skimmer 3 rotates, the hinge 9 fixed to the pipe skimmer 3 also rotates about the horizontal axis X, as shown in FIG. When the inlet 2 reaches the water surface position, one end of the scum pan 4 is lowered with the upper end of the pan support portion 11 as the swing fulcrum 12, and the other end is lifted from the water surface. The concave arcuate surface 4B is substantially in contact with the outer peripheral surface of the pipe skimmer 3 on both sides of the scum inlet 2 (pointing to both sides in the direction of the back of the paper in FIG. 2). It is regulated by the side plate 4A. Thereby, the scum collected by the scum pan 4 and the raw water near the water surface flow into the pipe skimmer 3 from the scum inlet 2, and are discharged out of the tank and sent to, for example, the next water treatment step.

  During the pivoting of the pipe skimmer 3, the scum pan 4 rotates relative to the pipe skimmer 3 around the connecting shaft 10 of the hinge 9. At this time, since the distance between the connecting shaft 10 and the pan support portion 11 changes, the scum pan 4 swings while sliding on the upper end of the pan support portion 11 as the clearance.

  According to the present invention, since one end of the scum pan 4 is rotatably connected to the outer peripheral surface of the pipe skimmer 3, there is almost no gap between the pipe skimmer 3 and the scum pan 4. Only the scum collected and the raw water near the water surface can flow from the scum inlet 2 into the pipe skimmer 3. That is, it becomes possible to discharge the water to the outside of the tank, and the load in the next water treatment process is reduced.

  Further, if the scum pan 4 is slidably mounted on a pan support 11 provided in the tank and the upper end of the pan support 11 is swung as a swing fulcrum 12, the pipe skimmer 3 and Since the scum pan 4 swings while sliding on the pan support portion 11 in accordance with the rotation of the connecting shaft 10 serving as a connecting portion with the scum pan 4, the swing of the scum pan 4 can be achieved with a simple structure. Assembly is simple and can be easily applied to existing pipe skimmer equipment.

  3A and 3B are explanatory views showing a modification of the scum removing device 1, wherein FIG. 3A is a side view, and FIG. The same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. In the present modification, the side plate 4A is appropriately provided, but is omitted in FIG. In the example of FIG. 3, without using the hinge 9 shown in FIG. 1, a bracket is attached to the outer peripheral surface of the pipe skimmer 3, and one end of the scum pan 4 is rotatably attached around the connecting shaft 10 formed on the bracket. Yes.

  In FIG. 1, the bottom of the scum pan 4 is slidably mounted on the pan support 11. However, in this modification, a long hole 17 is formed on the support member 15 extending in the tank width direction. The provided support bracket 16 is erected, and the pin 14 of the bracket 13 fixed to the bottom of the scum pan 4 is engaged with the long hole 17.

  In this modification, the pin 14 moves in the long hole 17 in accordance with the rotation of the connecting shaft 10, so that the scum pan 4 can be swung. There is almost no gap between the pipe skimmer 3 and the scum pan 4, and the effect of only the scum collected by the scum pan 4 and the raw water near the water surface flowing to the scum inlet 2 is the same as that shown in FIG.

  The best embodiment of the present invention has been described above. When the one end of the scum pan 4 is rotatably connected to the outer peripheral surface of the pipe skimmer 3, a foil-like chemical fiber material or a synthetic resin material having high strength and flexibility is used in addition to the hinge 9 and the like. be able to. If these are used over the entire width of the contact portion between the pipe skimmer 3 and the scum pan 4, there will be no gap generated in the connecting portion between the pipe skimmer 3 and the scum pan 4, and a further quantitative discharge becomes possible. Moreover, these members and the hinge 9 may be used in combination, and if a slight gap generated between the hinges 9 arranged at intervals is filled with a foil-like chemical fiber material or a synthetic resin material, the gap is almost eliminated. None.

  The present invention is not limited to a sewage treatment facility, and can also be applied to industrial wastewater treatment tanks.

It is side surface explanatory drawing of the scum removal apparatus which concerns on this invention, and shows the state which has a scum inflow port in the position above a water surface. It is side surface explanatory drawing of the scum removal apparatus which concerns on this invention, and shows the state which has a scum inflow port in a water surface position. It is explanatory drawing which shows the modification of the scum removal apparatus which concerns on this invention, (a) is a side view, (b) is AA sectional drawing in (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scum removal apparatus 2 Scum inlet 3 Pipe skimmer 4 Scum pan 9 Hinge 10 Connecting shaft 11 Pan support part 12 Oscillation fulcrum

Claims (1)

A pipe skimmer provided so that the scum inlet of the peripheral surface moves freely between a position above the water surface and a water surface position;
One end is located on the pipe skimmer side, the other end is submerged when the scum inlet is at a position above the water surface, and the other end is lifted from the water surface when the scum inlet is at the water surface position, and the scum is moved to the scum. A scum pan provided swingably so as to flow to the inlet,
A scum removing device comprising:
One end of the scum pan is rotatably connected to the outer peripheral surface of the pipe skimmer ,
A scum removing device, wherein the scum pan is slidably mounted on a pan support portion provided in a tank, and is swung with an upper end of the pan support portion as a swing fulcrum .

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