JPH0595692U - Scum removal device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable effective collection and discharge of scum floating on the water surface regardless of fluctuations in water level. [Structure] The inflowing wastewater is filtered through a filter layer at the bottom of the treatment pond and discharged as treated water, and is provided in a treatment pond configured so that the filtration layer can also be backwashed. A scum removing device, in which a trough that collects scum floating on the water surface together with water and moves up and down together with the water surface, and the trough have a constant height above the water surface. It is characterized in that it is provided with a level control means for vertically moving and a pump for sucking scum attracted in the trough and discharging it to the outside of the pond.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a scum removing device.

[0002]

[Prior Art]

 For example, in a filter pond, inflowing sewage is filtered through a filter layer at the bottom of the treatment pond and discharged as treated water. In this filtration pond, if large scum accumulates, the filtration function deteriorates, so the filtration layer can be backwashed. Large scum floats in the pond during inflow / outflow and backwash, so it is necessary to collect it.

[0003]

[Problems to be solved by the device]

 Until now, the scum removal device was fixed in the pond, so it was not possible to expect a sufficient effect.

[0004]

[Means for Solving the Problems]

 This invention was made to solve these problems.The inflowing sewage is filtered through the filter layer at the bottom of the treatment pond and discharged as treated water, and the filter layer can also be backwashed. It is a scum removal device installed in a treatment pond configured to be capable of collecting scum floating on the water surface together with water and opening and closing a trough that moves up and down with the water surface. It is provided with a level control means for moving up and down while keeping the trough at a constant height so as to have a fixed positional relationship, and a pump for sucking scum attracted into the trough and discharging it to the outside of the pond. Characterize.

[0005]

[Action]

 Like the solution means, a trough that opens a suction port capable of collecting scum floating on the water surface together with water and moves up and down with the water surface; and the trough is fixed so that the suction port has a fixed positional relationship with respect to the water surface. Since it is equipped with a level control mechanism that moves up and down while raising the height, and a pump that sucks scum attracted into the trough and discharges it out of the pond, scum floating on the water surface is always maintained. It becomes possible to collect and discharge effectively.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. 1 to 3 show an embodiment of the present invention. In this embodiment, reference numeral 1 denotes a filter basin, which is quadrangular when viewed from the top and has a side wall 1a and a bottom wall 1b, and a pair of projecting edges 1c is integrally provided at the upper end opening. ing.

A sand layer 2 is provided on the bottom of the filter basin 1 so as to exert a filtering function. Sewage is supplied to the filter basin 1 in the direction of the arrow in FIG. 1, and is discharged through the sand layer 2 while being filtered. An overflow weir 6 is provided in the filter basin 1 and communicates with the outside.

A handrail 3 is provided on the edge 1c of the filtration basin 1 and a fixing plate 4 for installing the apparatus is provided. The fixing plates 4 are T-shaped and are fixed to the corners of the pond 1, respectively.

Two rods 5 are vertically fixed to each fixing plate 4 so as to extend into the pond. A stopper 5a is provided at the lower end of the rod 5. A float (one of level control means) 10 is provided on the rod 5 so as to be able to move up and down.

A trough 20 is attached to the float 10, and an opening at the upper end of the trough 20 serves as an inlet 21 slightly below the water surface 24, and an underwater pump 22 is provided therein. .. The upper surface of the pump 22 serves as a suction port, and the scum can be discharged to the outside of the pond through the valve 23. This pump may be outside the trough 20 or may be a water pump type such as a pond.

Reference numeral 30 is a weightless hoisting device which is another one of the level control means. The device 30 includes a drum 31, and a lower end of a tube 32 wound around the drum 31 is connected to the pump 22. This hoisting device 30 may be of a hoisting force variable type. The scum from the pump 22 is discharged to the outside of the pond through the tube 32 through the rotary joint.

The tube 32 always applies a pulling force upward with a constant force in order to supplement the lifting force for the pump 22 which is insufficient in the float 10, and when it is further insufficient, as shown in FIG. In addition, weight 33 may be added. The weight 33 may be variable in weight.

4 to 6 show a more specific embodiment. In this specific example, protruding plates 25 are horizontally provided on both sides of the trough 20, and an adjusting tool 26 is provided between the protruding plate 25 and the float 10 so as to adjust the space therebetween. The adjuster 26 is provided in consideration of an increase in weight when the pump 22 is driven and water enters the pump 22 and the tube 32.

The float 10 is provided with a recess 10 a at the bottom thereof, and the recess 10 a is provided so as to be separated from the attraction port 21 of the corresponding trough 20 so that the scum flows therein. In addition, the inlet 21 is provided with a groove 21a so that a large scum can flow in, and a control plate 27 that can be adjusted up and down so that the amount of the groove 21a can be adjusted.

A balancer 28 is provided on the projecting plate 25 so that the amount of floating and sinking can be adjusted auxiliary.

As shown in FIGS. 2 and 3, L is the lowest water level, H is the highest water level, and M is the backwash water level. The pump 22 starts operating at the lowest water level L, and stops operating at the highest water level H. During that time, scum and water are sucked from the inlet 21 and discharged to the outside through the tube 32.

As a result of the float 10 moving up and down and the trough 20 moving up and down in synchronization with this, scum can always be collected even if the water level changes. When the scum is clogged in the sand layer 2, it reaches the backwash water level M and is drained from the overflow weir 6, and at that time, backwash treatment is performed. A large amount of scum is also collected during this backwash.

It should be noted that FIGS. 7 to 10 show additional examples. 7 and 8 show the use of a screw pump 40 to collect scum. A fixed outer cylinder 41 is provided on the outer periphery of the lower portion of the pump 40, and an inner cylinder 42 that can move up and down is provided inside the cylinder 41. Floats 43 ... Are provided on the outer periphery of the inner cylinder 42, and the floats 43 ...

The upper end of the inner cylinder 42 is a guide port 42 a, and the scum and water enter through the guide port 42 a and enter the screw pump 40 from the inner cylinder 42. Then, it is discharged from the discharge port 44. A seal 45 is provided between the inner cylinder 42 and the outer cylinder 41. Further, a screw portion 42b is formed in the lower portion of the inner cylinder 42 so that scum and water can be guided into the pump 40 more smoothly. 46 is a mount.

As shown by phantom lines in FIG. 8, a float 50 having a hollow shape and an opening 50a is attached to the upper end of the guide cylinder 51, and the float 50 swings to follow the water level. Alternatively, the scum and water may be introduced into the pump 40 through the cylinder 51.

In the example shown in FIG. 9, the screw cylinder 55 is directly provided with a large number of upper and lower suction ports 55a, and the scum and water are sucked from the suction ports 55a corresponding to the water surface when the cylinder 56 moves up and down. It has become. Reference numeral 57 is a seal provided on the inner circumference of the cylinder 56.

In the example shown in FIG. 10, a cylinder 61 provided on the outer circumference of the pump 60 is formed into a bellows type, and a scum and water are guided while expanding and contracting by a float 62 that moves up and down according to the fluctuation of the water level. ..

[Effect of the device]

The present invention is as described above. Therefore, it becomes possible to always effectively collect and discharge scum floating on the water surface irrespective of the fluctuation of the water level.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view showing a main part of the apparatus.

FIG. 5 is a sectional view thereof.

FIG. 6 is a front view thereof.

FIG. 7 is a plan view showing an additional example.

FIG. 8 is a schematic diagram thereof.

FIG. 9 is a schematic view showing another additional example.

FIG. 10 is a schematic view showing another additional example.

[Explanation of symbols]

 1 Filter Pond 2 Sand Layer 10 Float 20 Trough 21 Induction Port 22 Pump 24 Water Surface 30 Unpowered Hoisting Device

Claims (1)

[Scope of utility model registration request] 1. A treatment pond configured so that inflowing wastewater is filtered through a filtration layer at the bottom of the treatment pond and discharged as treated water, and that the filtration layer can also be backwashed. A scum removing device provided,
A trough that moves up and down with the water surface by opening an attracting port that can collect scum floating on the water with water, and a level that raises and lowers the trough while keeping the trough at a constant height above the water surface. A scum removing device comprising: a control means and a pump for sucking scum attracted into the trough and discharging the scum outside the pond.