JPS62258714A - Apparatus for purifying suspension by sedimentation - Google Patents

Abstract

PURPOSE:To efficiently sediment and concentrate the suspended component in raw water, by providing a water stream deflecting means for setting introduced raw water to a horizontal direction at the central part of a spiral water channel. CONSTITUTION:Turbid raw water flows in a tank from the introducing pipe 8 set to the central part of a spiral partition plate 5 to fill a clarifying chamber 1a but, at this time, the inflow energy of raw water is turned to a horizontal direction by a water stream deflecting means due to a spiral bottom plate 9a to push out the whole of raw water in a spiral water channel in a stable state. In a process allowing raw water to flow through the spiral water channel partitioned by a long flow passage, the suspended substance in raw water falls linearily to an oblique direction to be sedimented and concentrated in a concn. chamber 1b and is taken out to the outside from the discharge port 2 of the bottom part by valve operation. The clarified water in raw water from which the suspended substance was removed rises in the clarifying chamber 1a by rearward push-out force and floods over the zigzag weir 3 formed to the outer periphery of the clarifying chamber 1a to be gathered to a water gathering tub 4 and is taken out from a lead-out port 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a sedimentation purification device that continuously separates and extracts suspended water discharged from general factories into concentrated suspended components and clear water.

[Background technology]

Precipitate suspended raw water such as factory wastewater'#4. A spiral waterway partition plate is installed in the clarification chamber above the settling tank as a device to separate turbid components and clear water. A device is known in which suspended solids in the raw water are allowed to settle in a concentration chamber below while the raw water introduced from the center of the swirl is made to flow along the swirl channel.

In conventional devices of this kind, the outer edge of the spiral waterway partition plate is connected to the inner wall of the tank, so the width of the waterway becomes uneven, and the tip of the waterway is blocked, resulting in stagnation and backflow. As a result, the suspended matter that had once settled would be stirred up and cause turbidity (again), resulting in the fatal problem that it was impossible to take out the water as clear water. Furthermore, since no consideration was given to a means for imparting directionality to push the raw water introduced into the tank in a horizontal direction, a well-balanced flow could not be obtained, reducing the efficiency of the settling action.

An object of the present invention is to provide a sedimentation purification device that provides stable flow energy to raw water in a clarification chamber and eliminates turbidity caused by stagnation and backflow.

[Summary of the invention]

In order to achieve the above object, the present invention provides a series of spiral waterway partition plates in the clarification chamber of a settling tank which is integrally connected with a cone-shaped concentration chamber having a sludge extraction section below the cylindrical clarification chamber. are spaced apart and vertically arranged so as to form a waterway between the outer edge and the wall of the clarification chamber, and an inlet pipe for suspended raw water is vertically inserted into the spiral center of the waterway partition plate, Furthermore, a water flow deflection means is provided at the center of the swirl of the channel partition plate for pushing out the raw water introduced into the clarification chamber in the horizontal direction.

The water flow deflection means may be constructed of, for example, a spiral bottom plate of an appropriate length provided below the spiral center of the waterway partition plate, and the raw water introduction pipe is introduced at the center of gravity of the raw water in the clarification chamber. A configuration in which the mouth is oriented horizontally may also be used.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a sedimentation tank in which a concentration chamber ib having a tapered downwardly inclined inner wall is connected to the lower part of a cylindrical clarifying chamber 1a. This sedimentation tank 1 has a sludge discharge port 2 at the lower end, and a zigzag weir 3 for overflowing and taking out clarified water around the upper end of the clarification chamber 1a.
Furthermore, a water collection bucket 4 is attached to the outer periphery of the clarification chamber 1a.

The clarification chamber 1a of the settling tank 1 has a water area and water depth according to the amount of suspended water (raw water) to be treated, and a series of spiral water channel partition plates 5 are vertically disposed inside the clarification chamber 1a. ing.

The waterway partition plate 5 has a height extending from the bottom of the clarification chamber 1a to slightly above the zigzag weir 3 at the top, and
It consists of a series of spiral plates that divide the diameter into waterways 11 of approximately equal diameter, and are spaced apart so as to form a waterway 6 between the outer edge 5' and the clarification chamber 1a. is suspended. In the illustrated embodiment, the upper part of the partition plate 5 is connected to and suspended from a cross-shaped bracket 7 fixed to the water collection tank 4.

The first feature of the present invention is that the outer edge 5' of the spiral waterway partition plate 5 is opened between the inner wall surfaces of the clarification chamber 1a to form a waterway 6. In la, a series of long water channels are formed by the spiral waterway partition plate 5, which extend from the spiral center of the partition plate 5 to the inner peripheral wall of the clarification chamber 1a, and are completely open between the inner peripheral wall of the clarification chamber 1a. has been done.

Q' is placed in the center of the spiral partition plate 5 of the clarification chamber 1a in the tank 1.
(An introduction pipe 8 for introducing Q raw water is inserted from above.

This type of device is used during the process of flowing suspended water introduced into the tank through the spiral water channel 5 in the clarification chamber la)
U The turbid substances are precipitated in the lower concentrating chamber 1b and separated into clear water and suspended matter. In order to efficiently settle the suspended components, stable flow energy is given to the raw water in the clarification chamber la. There is a need. For this purpose, in the present invention, a water flow deflection means 9 is provided at the center of the spiral waterway, that is, at the raw water introduction part, to change the inflow energy of the raw water in the lateral direction.

As shown in FIGS. 3 and 4, for example, the water flow deflection means 9 is provided with a spiral bottom plate 9a having an appropriate swirl length (preferably 1 to 1.5 turns) at the lower part of the center of the spiral partition plate 5. Alternatively, as shown in FIG. 5, the inlet 9b of the raw water inlet pipe 8 may be oriented laterally at the center of gravity of the raw water in the clarification chamber 1a. In this case, the center of gravity of the water in the clarification chamber is usually two-thirds of the depth from the water surface.
Therefore, the tip of the introduction tube 8 is extended to this depth, and the introduction port 9b is arranged horizontally.

The sedimentation tank 1 has an inner wall inclined downward in a cone shape toward the discharge port 2 so that the accumulated suspended solids are concentrated by their own weight and discharged.

Next, the present invention will be explained in detail.

Suspended raw water flows into the tank from a fathom pipe 8 placed in the center of the spiral partition plate 5, and fills the clarification chamber 1a.
9b etc.), it is directed horizontally and pushes out the entire raw water in the spiral waterway in a stable state toward the outer circumference. As a result, the raw water in the clarification chamber la becomes a continuous pushing flow toward the outer periphery along the spiral waterway, and flows horizontally as if sliding on the upper surface of the contraction chamber 1b. In the process of flowing through a spiral waterway partitioned into long channels, the suspended matter descends diagonally straight down the waterway, settles in the concentration chamber, and is concentrated. Extracted to the outside using a pump, etc.

On the other hand, the clarified water in the raw water from which suspended solids have been removed rises in the clarification chamber la due to the pushing force of the downstream flow, overflows the zigzag weir 3 formed on the outer periphery of the clarification chamber 1a, and is collected in the water collection trough 4. , taken out from the outlet 10.

〔Effect of the invention〕

As described above, since the device of the present invention is provided with a water flow deflecting means for horizontally directing the introduced raw water in the center of the spiral waterway, it is possible to impart stable flow energy to the raw water in the clarification chamber. Therefore, suspended components in raw water can be efficiently precipitated and concentrated.

Further, since the outer edge of the spiral waterway partition plate is separated from the inner wall of the clarification chamber and a flow path is formed therebetween, the raw water in the clarification chamber continues to swirl gently, and there is no risk of stagnation or backflow. Therefore, there is no risk that the clear water will stir up and resuspend the precipitate in the concentration chamber below, unlike in the past, and the treated water can always be taken out while maintaining a predetermined level of clarity.

[Brief explanation of drawings]

FIG. 1 is a side view of one embodiment of the device of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a vertical sectional view of FIG. 1, and FIG. 4 is a cross section taken along line IV-[1/ of FIG. FIG. 5 shows a third example according to another embodiment.
It is a figure equivalent figure. 1... Sedimentation tank, la... Clarification chamber, 1b... Concentration chamber, 2... Sludge outlet, 3... Zigzag weir, 4.
...Water collection bucket, 5...Water flow channel partition plate, 7...Support bracket, 8...Introduction pipe, 9...Water flow deflection means,
9a...Spiral bottom plate, 9b...Inlet.

Claims (1)

[Scope of Claims] (1) A sedimentation tank 1 formed by integrally communicating a concentration chamber 1b below a cylindrical clarification chamber 1a, and a series of spiral-shaped sedimentation tanks arranged perpendicularly to the clarification chamber 1a of this sedimentation tank 1. Waterway partition plate 5 and suspended raw water introduction pipe 8 inserted into the spiral center of waterway partition plate 5
In the apparatus for sedimentation and purification of suspended water having
The clarification chamber 1a is spaced apart from each other so as to form a water channel 6 between the inner walls of the partition plate 5.
Suspended water sedimentation purification device (2) characterized in that it is provided with a water flow deflection means 9 for pushing out the introduced raw water along the spiral waterway partition plate 5 (2) The water flow deflection means 9 is Claim 1, characterized in that it consists of a spiral bottom plate 9a disposed along the lower part of the water channel at the center of the spiral.
Suspended water sedimentation purification device (3) as described in 1. A patent characterized in that the water flow deflection means 9 is comprised of an inlet 9b provided laterally to the raw water inlet pipe 8 at the level of the center of gravity of the raw water in the clarification chamber 1a. Suspended water sedimentation purification device according to claim 1