JPS6024403Y2 - Concentrator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a concentrating device for precipitating and concentrating sludge used in the treatment of sewage, human waste, industrial waste liquid, and other wastewater.

Conventionally, gravity concentration has been the most common method for concentrating sludge in various suspensions.

However, depending on the quality of the sludge, there are cases in which thickening hardly progresses even if sufficient thickening time is given.

This is because the sedimentary particles interfere with each other to form a structure and consolidation does not proceed.

To deal with this, picket fences are generally installed, but because they are attached to scraping arms, the speed is slow and is not sufficient to destroy the sludge structure and promote consolidation, and it also affects the concentration rate. There were limits and I was not satisfied.

The present invention is intended to solve these conventional problems, and aims to provide a concentrating device that can significantly increase concentration efficiency and significantly improve workability.

This invention uses gravity sedimentation to form a clarification section at the top and a compaction section for settled sludge at the bottom, and in a thickening tank with a scraper at the bottom, there is a horizontal rotation near the boundary between the clarification section and the compaction section of the thickening tank. This concentrating device has a large number of rod-like members attached in the axial direction via a shaft, and the horizontal rotating shaft is rotatably connected to a scraper.

In the illustrated example, a large number of rod-shaped members 1 are arranged at predetermined intervals in the axial direction near the boundary between the clarification section and the consolidation section in a concentration tank B in which a scraper A is provided at the bottom so as to be able to rotate around a rotation axis C. A horizontal rotating shaft 2 with an array of The member 1 is used as a rotating brush and is rotated into the sludge layer to apply shear to the sludge, causing structural destruction of the sludge particles and promoting interference settling and consolidation.

The rod-shaped members 1 are installed radially on the horizontal rotating shaft 2, and the length of the rods increases at the center of the tank and gradually decreases toward the outer circumference of the tank at predetermined intervals in the axial direction of the horizontal rotating shaft 2. A large number of rotating brushes are arranged to prevent sludge from carrying over.

That is, the diameter of the rotating brush is made larger at the diameter D1 at the center of the tank and smaller at the diameter D2 at the tip.

That is, the sludge is difficult to carry over in the center of the tank even if it is agitated to some extent, but the tip is close to the supernatant water overflow area and therefore does not cause any agitation.

The horizontal rotating shaft 2 is mounted on the scraping machine A in a horizontal state via a stand 6 with bearings 3, 3, and is engaged with a fixed gear 5 in the tank or a guide rail by a gear 4 or a solid tie provided at one end. The gear 4 is rotated on the fixed gear 5 in the tank by the rotating movement of the stopper A, and the rod-shaped member 1 is rotated between the sludge consolidation part and the clarification part.

That is, it is convenient to place the horizontal rotating shaft on the scraper arm of scraper A so that it can rotate, and rotate the brush by using the reaction force of the gear from the tank wall. It is also possible to drive the horizontal rotating shaft 2 with a gear mechanism or other transmission member using the rotational drive of the rotating shaft C of It can also be used selectively.

Note that the speed at the tip of the rod-shaped member 1 constituting the rotating brush can be made greater than the speed of the scraper by reducing the shaft-side gear diameter D3.

That is, it is considered that the tip speed V2 of the rod-shaped member 1 having a diameter D□ is (slaper tip speed V, shaft side gear diameter D3) = VxDL 1D3 to facilitate interference settling and consolidation.

Further, as shown in FIGS. 3 and 4, it is effective to make it possible to change the mounting direction of the rod-shaped member 1 in order to cope with the occurrence of sludge carryover due to agitation by rotation of the brush.

For example, a receiving ring 7 in which the rod-shaped member 1 is radially provided is inserted into the horizontal rotating shaft 2 and held by a fixing pin 8, for example, a screw, and the supporting state is changed by moving the fixing pin 8 back and forth, and the horizontal rotating shaft of the rod-shaped member 1 is By changing the mounting direction with respect to 2, the surface of the shearing part can be changed.

This makes it possible to adjust the structural destructive force exerted on the sludge, which is an advantage, and the carryover of the sludge due to stirring, which is a disadvantage.

That is, the solid line position in FIG. 4 is a case where sludge is likely to carry over, and the dotted line position is an effective case where sludge is difficult to carry over.

The middle part of the figure is the sludge pit, E is the sludge pipe, and F is the water collection ditch.

It is preferable to have a configuration in which the horizontal rotating shaft 2 of the brush can be set at the most efficient position by moving it up and down, but in this case, the fixing position of the base 6 of the bearing 3 can be changed by a combination of bolts and elongated holes. Alternatively, the setting position of the rotating brush may be changed by using a pinion rack mechanism, or by using the rotating shaft C of the scraper A as a double axis so that it can slide in the axial direction. good.

The water to be treated that flows into the thickening tank B is purified by precipitating and concentrating the sludge, and the separated water is extracted from the bottom of the water collection groove, and the sludge that has settled at the bottom of the tank is efficiently removed from the sludge pit D by the scraper A. The sludge is discharged, but a rotating brush composed of a rod-shaped member 1 is rotated between the consolidation section and the clarification section of the thickening tank B, and shearing by this rotating brush is applied to the sludge, causing structural destruction of the sludge particles. As a result, interference sedimentation and consolidation can be promoted, and the concentration work can be carried out effectively.

This invention uses gravity sedimentation to form a clarification section at the top and a compaction section for settled sludge at the bottom, and in a thickening tank with a scraper at the bottom, there is a horizontal rotation near the boundary between the clarification section and the compaction section of the thickening tank. By disposing a large number of rod-shaped members attached in the axial direction via the shaft, and by rotatably connecting the horizontal rotating shaft to the scraper, the shearing caused by the rotating brush can be applied to the consolidation part and the clarification part in the thickening tank. It can be added to the sludge between sludge particles to cause structural destruction of the sludge particles, increase interference settling and consolidation, make thickening work more efficient, and greatly reduce the thickening time.Moreover, it does not interfere with sludge collection. It has practical effects suitable for large-scale treatment, such as being able to be used without causing sludge sludge, and allowing concentration treatment to be performed while preventing sludge carryover.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention.
The figure is a partial plan view, FIG. 3 is an enlarged front view taken along line II in FIG. 1, and FIG. 4 is a longitudinal sectional view thereof. A: Scraping machine, B: Concentrator tank, C:
... Rotating shaft, 1 ... Rod-shaped member, 2 ...
・・Horizontal rotating shaft, 3・・・Bearing, 4・・・・
Gear, 5...Fixed gear, 6...Curved platform, 7...
...Receiving ring, 8...Fixing pin.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A thickening tank that forms a clarification section in the upper part and a consolidation part of settled sludge in the lower part by gravity settling, and has a scraper at the bottom,
A concentrating device in which a large number of rod-shaped members are rotatably arranged near the boundary between a clarification section and a consolidation section of the concentration tank, and the rod-shaped members are rotated in conjunction with a scraper. 2. The rod-shaped members are radially attached to the horizontal rotation shaft and arranged in large numbers in the axial direction of the horizontal rotation shaft,
The concentration device according to claim 1, wherein the length of the rod-like member is decreased from the center of the tank toward the side wall of the tank. 3. Utility model registration claim 1 or 2, wherein the rod-shaped member is attached to the rotating shaft via a receiving ring, and the direction and angle of the attachment can be changed. Concentration device as described in section. 4. Utility model registration claims 1, 2, or 3, wherein the rod-shaped member is a rotating brush attached to a horizontal rotating shaft, and the horizontal rotating shaft is arranged so as to be adjustable in the vertical direction. Concentration device as described in section. 5. The rod-shaped member is installed in the raking machine via a rotating shaft, and is rotated by rotation of the raking machine by meshing a gear provided on the rotating shaft with a gear fixed to the tank wall. An actual concentrating device as set forth in claim 1, 2, or 3 of the utility model registration claim. 6. The concentrating device according to claim 5, wherein the rod-shaped member is a rotating brush, and the brush tip speed is higher than the circumferential speed of the scraper.