JPS6022912A - Solid separating apparatus - Google Patents

Abstract

PURPOSE:To obtain a compact settling tank by providing a circular tank, a discharge mechanism of a solid-contg. liquid, and a treated liquid discharge mechanism, scraping together the solids accumulated in the central recess of the circular tank by a rake, and transferring the solids to a storage tank by a pump. CONSTITUTION:The liquid to be treated is supplied into a circular tank 1 from an inflow port 4 through an inflow passage 3. The liquid to be treated circulates rapidly at the central part and slowly at the outer circumference by a rake 19 of a scraping machine 16, and the sand, etc. having a larger sp. gr. flows toward the center along the bottom 5 of the tank. The solids settled on the bottom 5 of the tank are accumulated in a recess 6 at the central part. The solids are discharged by a pump 9 together with a liquid as the solid-contg. liquid contg. a large quantity of solids. Meanwhile, the treated liquid free from solids is sucked by a pump 14, and sent to the next stage.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for separating solids from a treated liquid containing powdery solids such as sediment or sludge-like solids in sewage or rainwater treatment to obtain a clean treated liquid. This relates to a material separation device. Conventionally, when separating the solids from the liquid to be treated, especially in the case of rainwater treatment where a large amount of liquid to be treated is handled, the liquid to be treated is introduced into a large sedimentation tank (or sedimentation pond) to separate the solids. is allowed to settle by gravity, and the resulting clean treated liquid is led to another storage tank (or reservoir),
The water was once again discharged from the storage tank using a discharge structure such as a pump. - To remove solid matter such as sediment that has separated and settled on the bottom of the pond, it is first raked with a raking machine, then raked with a rock and transported to the pond surface with a transport mechanism such as a conveyor or reverse. . This conventional method has the following disadvantages.

(1) Since separation is carried out by gravity precipitation, continuous operation is sufficient.

(2) Therefore, processing time becomes longer.

(:() To shorten the processing time, a wide sedimentation tank is required.
This requires a large space for people to work on the site.

(4) In order not to disturb the sedimentation process, a separate storage tank is required to guide the treated liquid, and a large site space is required.

(5) In order to take out the precipitated solids, devices such as scrapers, scrapers, and conveyors are required, which requires equipment costs, operating costs, and maintenance, and requires space.

(6) Since the solid matter removal operation using these devices cannot be carried out simultaneously with the precipitation operation, the processing time becomes even longer.

It is a matter of lack of such things.

The present invention eliminates the two drawbacks of the conventional ones, and allows continuous separation of solid matter from a large amount of liquid to be treated, such as rainwater treatment.Moreover, the device is small and requires space. It is an object of the present invention to provide a solid matter separator that does not require complicated equipment and can reduce equipment costs, operating costs, and maintenance efforts.

The present invention includes a circular tank having a substantially cylindrical peripheral wall, a solid liquid discharge mechanism that sucks out and discharges a solid liquid containing a large amount of precipitated and separated solids, and a solid liquid discharge mechanism that discharges the treated liquid after separating the solid substances. A treated liquid discharge mechanism is provided, the peripheral wall of the circular tank is provided with an inflow path through which the liquid to be treated flows in, a recess is provided approximately in the center of the bottom of the circular tank, and the solid liquid is discharged. Make the solid liquid suction 1 of the mechanism face the recess, and
This solid matter separator is characterized in that it is equipped with a stirring mechanism having a scraper rotating around a vertical axis in the center of the circular tank.

Embodiments of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a circular tank having a circumferential wall 2 having a substantially cylindrical shape, and an inflow passage 3 through which a liquid to be treated flows into a part of the circumferential wall 2 opens into an inflow port 4 . The inlet 4 may be positioned toward the center of the circular tank 1, or may be directed toward the peripheral wall 2 so that the inlet 4 flows tangentially. A recess 6 is formed approximately in the center of the tank bottom 5 of the circular tank 1.

The peripheral wall 2 may be circular, oval, elliptical, spiral, etc. as long as it allows the liquid to be treated to smoothly swirl and flow along the peripheral wall 2 due to the swirling action of the stirring mechanism as described later. . Further, as shown in the figure, only the central part of the recess 6 may be recessed deeper, or only the central part of the tank bottom 5 may be recessed to form the recess 6, and the other parts may be flat. Also fifty. In addition, since the entire tank bottom 5 is slanted and shaped, only the center part is partially flattened, so that the solids can be drawn from the suction lower, suction pipe 8, pump 9, and discharge pipe 101 at an angle of 0°. A discharge mechanism is formed, and as described later, solid matter such as sediment accumulated in the recess 6 is sucked out as a solid liquid containing a large amount of solid matter, and sent to the storage tank 11 or νA1 to a device for the next process located at a distance. It's going well. In order to effectively discharge the solid liquid, the suction lower is provided facing the recess 6.
Ru.

The suction pipe 12, the suction pipe 13, the pump 14, and the discharge pipe 15 form a treated liquid discharge mechanism, which sucks out the clean processed liquor liquid after solids have been separated and sends it to the next stage. There is.

Reference numeral 16 denotes a stirring mechanism, which has a stirring plate 19 rotated by a vertical rotation shaft 11N driven by a motor 17.

The height of the scraper plate 19 is selected so that it can be stirred even at the lowest water level. (You don't have to worry about it slipping in when the water is at its highest level.) It is also possible to raise and lower it (adjustable).

The effect will be explained.

The liquid to be treated passes through the inflow path 3 and flows into the circular tank 1 from the inflow 1''4. The liquid to be treated that flows in and is stored in the circular tank 1 circulates through the scraping plate 191 of the scraping mechanism 16 in the direction of the arrow 20, faster at the center and looser at the outer periphery.
Due to the centrifugal action of the liquid surface (=I), the liquid flow near the liquid surface (=I) is directed toward the external force, and at the center F, a suction flow is generated as shown by the arrow 22.As a result, a secondary circulation flow is generated as shown by the arrows 23, 24, and 22. , and sand with a large specific gravity flows along the tank bottom 5 as shown by an arrow 24 toward the center.

The solids that settle on the tank bottom 5 are collected in the center by this secondary flow and are dumped into the recess 6 near the center.

This accumulated solid matter is sucked out from the suction 1-17 by the pump 9 as a solid fF liquid containing a large amount of solid matter, and is lost.

- The liquid to be treated from which solid matter has been removed is sucked up by the pump 14 from the suction 1i112 and sent to the next step.

The solid content #IIU device of the present invention can be applied to solid-liquid separation in chemical processes, sludge removal processes in industrial wastewater treatment, sludge removal and sand settling processes in sewage/rainwater treatment, etc.

According to the present invention, it is possible to provide a solid matter separator having the following remarkable advantages, and it can be seen that it has extremely great practical effects.

(1) Even if the water to be treated is allowed to flow in continuously, the precipitated solids are continuously collected in the center, and the solids are continuously discharged by the solid liquid discharge mechanism, and the treated liquid is discharged (somehow). Since the system discharges continuously, solids can be separated continuously.

(2) Therefore, the problem can be solved by making the separation tank extremely quiet.

(3) Coupled with the high separation speed, a large amount of liquid to be processed can be processed in a short time.

(4) Since precipitation, solid liquid discharge, and treated liquid discharge are performed at the same time, the storage tank for treated liquid discharge can also be used as a separation tank.
ll, and there is no need to provide a separate discharge tank.

(5) raking and scraping of solids for the purpose of discharging solids;
A large number of ancillary facilities 41ii for transportation and the like are not required, and the solids can be discharged by a simple solids liquid discharge mechanism.

(6) For the above reasons, the required space is extremely small, the quantity of equipment is also significantly reduced, site costs, equipment costs, maintenance costs, operating costs, etc. are reduced, and the equipment is simple and has fewer failures. , reliability is included.

[Brief explanation of drawings]

FIGS. 1 and 2 are a plan view and a vertical cross-sectional front view of an embodiment of the present invention. 1...Circular tank, 2...Peripheral wall, 3...Inflow channel, 4...Inflow 1 top, 5...Bottom of the tank, 6...Recess, 7...Suction l], 8...
・Suction pipe, 9... Pump, 10... Discharge pipe, 11... Storage tank, 12... Suction 11.13... Suction pipe, 14... Pump, 15... 111 Outlet pipe, 16... Stirring Mechanism, 17.
・Motor, 18... Co-rotating shaft, 19... Scraping plate, 20, 22
,23.24...Arrow.

Claims (1)

[Claims] 1. A circular tank with a roughly cylindrical peripheral wall, a solids liquid discharge mechanism that sucks out and discharges a solid liquid containing a large amount of precipitated and separated solids, and a system that discharges the treated liquid after separating the solids. The peripheral wall of the circular tank is provided with an inflow path through which the liquid to be treated flows in, and the west face is provided at approximately the center of the bottom of the circular tank, and the solid liquid is discharged from the solid liquid. The solid liquid suction port of the discharge mechanism faces the recess, and a stirring mechanism is provided approximately in the center of the circular tank, the stirring mechanism having a scraping plate that rotates around the vertical axis of the saliva. material separation equipment.