JPS592878Y2 - Rotating disk processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating disk treatment device that purifies wastewater by rotating a rotating disk.

Sewage purification treatment equipment includes trickling filter method, activated sludge method,
It is well known that there are contact aeration methods, rotating disk methods, etc.
Among these methods, the rotating disk method has a large purification capacity and reduces the amount of sludge generated.
Because it has features such as low power cost and easy maintenance, it has become very popular in the Kinhayabusa market.

However, this rotating disk method is not without its drawbacks.
One such problem is clogging due to the growth of biofilm between the discs caused by the rotation of a group of closely packed discs at the same speed.

Measures to eliminate or prevent this clogging are usually 20
It is possible to widen the disc spacing to ~3Qmm, or to provide a baffle plate between the discs and forcibly peel off the excessively proliferated biofilm with the baffle plate, or to alternately separate adjacent discs. A method has been proposed in which the discs are tilted to forcibly generate a water flow between the discs as they rotate, thereby increasing contact with wastewater and preventing clogging.

Increasing the spacing between the discs is undesirable because it reduces the surface area that comes into contact with wastewater, which is a feature of the rotating disc method.In addition, it is not desirable to provide baffles between the discs. This is undesirable as the disc may be damaged or damaged.

Furthermore, the method of generating water flow by alternately tilting adjacent discs is also undesirable in terms of processing capacity because it reduces the number of rotating discs per axial length and reduces the effective contact surface area for processing. .

In view of the above-mentioned shortcomings of the existing technology, the present invention generates water flow between the disks without changing the basic rotating disk method in which dense disks are arranged at regular intervals. The purpose of this paper is to propose a new and useful technology that can effectively prevent clogging caused by static water stoppage and at the same time enhance the effect of contact between wastewater and the disk surface.

That is, the present invention is a rotating system in which a large number of discs are arranged and fixed at predetermined intervals, and a rotating shaft is rotated at a required speed, and one or both ends of the discs are configured to periodically reciprocate or pivot. The purpose is to propose a disk processing device.

Here, reciprocating movement means movement in which the outward and return paths are the same,
It does not matter whether it is straight or curved.

Further, the direction may be the axial direction of the rotating shaft, or the direction perpendicular to the axial center, that is, the vertical direction or the front-back direction.

However, in order to increase the water flow between the disks while also serving as a stirring effect, vertical movement and rotational movement described below are preferable.

The term "swivel motion" refers to a motion in which the forward and return paths do not coincide, such as rotational motion, and may be a perfect circular motion or an elliptical motion.

Also, when moving the shaft side end up and down, back and forth, or turning,
The respective movement periods and movement directions may be the same or different.

However, from the viewpoint of achieving a stirring effect, it is preferable that both ends alternately move in different directions.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1A 20 shows one embodiment of the system, and 1 in the figure is a treatment tank, in which a wastewater supply pipe 2 is provided on the left side wall 1a, a drain pipe 3 for treated wastewater is provided on the right side wall 1b, and the right side wall is provided with a water supply pipe 2 for wastewater. A discharge pipe 4 with a valve is provided at the bottom to discharge the sludge at the bottom of the tank.

5... is a disk immersed in the wastewater A in the treatment tank 1 in a semi-submerged state, and is spaced at a predetermined interval (usually 20 to 30 mm).
They are fixed to the rotating shaft 6 in an array arranged at intervals of 1.

This rotating shaft 6 is connected to a power shaft 7 via a pulley 8, an endless chain 9, and a pulley 10, and is configured to be rotated at a required speed suitable for purification processing, and is configured to be driven to rotate at a required speed suitable for purification processing. By attaching the pulley 8 eccentrically to the shaft 7 as shown in the opening in the figure, the left end of the rotating shaft 6 is configured to move up and down periodically.

In order to allow vertical movement of the left end of this rotating shaft 6, a long hole or groove 12 is formed vertically in the left end support frame 11, and a long hole or groove 12 is formed in the right end support frame 13 to prevent vertical movement. The peripheral edge of the pivot hole 14 is formed into a smooth arc shape in cross-sectional view so as to be the dead center of its vertical movement.

According to this configuration, the rotation of the power shaft 7 rotates the rotation shaft 6, the disk 5, etc., and performs the necessary purification treatment action on the wastewater A, and at the same time, the rotation shaft 6 is connected to the power shaft 7. Pulley 8
The left end side is reciprocated up and down with an amplitude twice the amount of eccentricity, thereby tilting the disk 5 from side to side with respect to the surface of the wastewater A, and increasing/decreasing the immersion rate. let

Then, by interlocking the left and right inclines of the discs 5, a water flow is generated in the wastewater A in the left and right direction of the treatment tank 1, and this flow is further promoted by being repeated periodically.

As a result, the wastewater A is stirred, and the conventional problems such as stagnation and uneven contact are removed, and the treatment efficiency is greatly improved.In addition, in synchronization with the generation and promotion of this water flow, the disk 5... changes the immersion rate, and the impact generated with the water surface during this change promotes the detachment of excess biofilm and prevents clogging.

Next, FIGS. 2 to 4 show other embodiments of the present invention, and FIG. 2 shows a case where both the left and right ends of the rotating shaft 6 are moved up and down alternately.
Figure 3 shows that when the left end of the rotating shaft 6 is rotated, the fourth
The figure shows the case where both left and right ends are pivoted in opposite directions.

When the rotary shaft 6 is reciprocated and rotated as shown in these examples, the stirring effect and clogging prevention effect are the same as or better than those of the above embodiments.

Since the rotating disk processing apparatus according to the present invention is configured in a diagonal manner, it has the following advantages over the conventional means mentioned at the beginning.

(1) Since the basic rotating disk method in which a large number of disks are densely packed is not changed significantly, the advantages of the basic rotating disk method can be preserved almost as is.

That is, the purification capacity is large, the amount of sludge generated is small, the power cost is small, and maintenance is easy.

(2) However, since one or both ends of the rotating shaft is reciprocated or rotated, a water flow is generated in the wastewater, resulting in an increase in treatment efficiency due to an improvement in the agitation effect, and at the same time, the immersion rate of the disk itself is reduced. Clogging can be effectively prevented by changing the

(3) When the rotating shaft is moved up and down or rotated, the immersion rate of the disk can be freely changed over a wide range, so by selecting a change in the immersion rate that matches the nature of the wastewater, optimal treatment can be achieved. Conditions can be established.

[Brief explanation of the drawing]

FIG. 1A is an overall front sectional view showing one embodiment of a rotating disk processing apparatus according to the present invention, the opening of the figure is a side view of FIG. FIG. 3 is a diagram showing the movement of main parts of the embodiment. 5... Disc, 6... Rotating axis.

Claims (1)

[Scope of utility model registration request] A rotary disk processing device that rotates at a required speed a rotating shaft on which a large number of disks are fixed at predetermined intervals, and one or both ends of the rotating shaft are traversed so as to periodically reciprocate or pivot.