JPS6221329Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a cleaning device for sieve residue, sedimentation, etc., and in particular, pre-processing cleaning of sieve residue, sedimentation, and other objects to be cleaned using overflow water from a downstream washing tank. The present invention relates to a cleaning device for cleaning sieve residue, sediment, etc., which significantly saves water and increases the cleaning effect.

[Conventional technology]

For example, a device for cleaning sieve sludge, sediment, etc. scraped up from sedimentation basins of sewage treatment plants and pumping stations by stirring and cleaning them while supplying cleaning water in a cleaning tank is the
This is already known as seen in Publication No. 33144. This is because the sieve residue, sediment, etc. are contaminated, and it is unhygienic to dispose of them directly in a landfill, etc., so they are cleaned as a pretreatment.

[Problem that the invention attempts to solve]

However, in the case of conventional cleaning equipment, 1
Since the structure was such that the cleaning process was carried out in one tank, dirt adhering to sieve residue, sediment, etc. would spread into the tank and contaminate the washing water, resulting in the objects to be cleaned being carried out from the tank still unsanitary. It was hot. Further, in order to improve the cleaning effect, the only way to improve the cleaning effect was to increase the amount of cleaning water supplied, which was uneconomical.

[Purpose of invention]

Therefore, the present invention was devised to solve the above-mentioned problems, and its purpose is to create a sieve residue that can increase the cleaning effect and significantly save water.
To provide cleaning equipment for sand settling, etc.

[Summary of the idea]

In order to achieve the above object, the present invention provides a stirring blade in a tank for storing input sieve residue, sediment, etc. and overflow water supplied from a downstream washing tank, and a discharge port having a screen at the top. A pre-washing tank is provided with a discharge port for the objects to be cleaned at the bottom, and by opening this discharge port, the objects to be washed in the tank are discharged at once; a second stage cleaning tank for cleaning discharged and dropped objects to be cleaned while supplying washing water; a floating matter transport means provided in the second stage cleaning tank for transporting floating matters out of the tank; and a second stage cleaning. A means for transporting objects to be cleaned that has settled in the tank to the outside of the tank;
and overflow water supply means for supplying overflow water from the rear stage cleaning tank to the front stage cleaning tank.

〔Example〕

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

In FIGS. 1 and 2, 1 and 1' are front-stage cleaning tanks for cleaning sieve residue, sediment, etc. while supplying overflow water from the rear-stage cleaning tank 2. In the illustrated example, there are two front-stage cleaning tanks. 1, 1' are formed. Since these pre-stage cleaning tanks 1 and 1' have the same configuration and are used alternately, only one will be explained. That is, a rotary stirring blade 5 is installed in the front-stage cleaning tank 1.
An overflow water supply pipe 6 for supplying overflow water from the latter stage cleaning tank 2 is connected thereto. In addition, the front-stage cleaning tank 1 is provided with a drain pipe 7 equipped with a bar screen 4 for discharging the supplied overflow water, and above the drain pipe 7 is provided with a bar screen 4 for discharging the supplied overflow water. An input conveyor 8 is provided for loading. Further, a discharge port 9 for discharging the contents is formed at the bottom of the front-stage cleaning tank 1, and an opening/closing lid 10 for closing the discharge port 9 is provided on the discharge port 9 so as to be openable and closable via a hinge 11. .

Below the front-stage cleaning tank 1 constructed in this manner, a rear-stage cleaning tank 2 consisting of a horizontally long tank body is provided with one end thereof facing the discharge port 9 . That is, by providing the front-stage cleaning tank 1 above the rear-stage cleaning tank 2, the contents are dropped into the front-stage cleaning tank 1 using potential energy, and the contents to be cleaned are washed in the rear-stage cleaning tank 2. It is designed to spread. Therefore, the object to be cleaned thrown into the latter-stage cleaning tank 2 flows along the longitudinal direction toward the other end while being spread and washed in the cleaning water in the tank due to its momentum.

On the other hand, a water supply pipe 12 is connected to the input side of the second-stage cleaning tank 2 at the other end for supplying clean water for cleaning, so that the objects to be cleaned can be fluidized and diffused. Furthermore, a floating matter carrying-out means 13 is provided in the second-stage washing tank 2 for carrying out floating matter (cleaning waste) having a light specific gravity, such as sieve residue, to the outside of the tank. This floating matter carrying out means 13 includes a screen 14 arranged so as to be inclined upward in the flow direction in the tank and to block the flow direction, and along the longitudinal direction of the screen 14 in order to carry out the floating matter captured by the screen 14 to the outside of the tank. The floating object conveyor 15 is arranged in parallel with the floating object conveyor 15. The screen 14 is made of wire rods arranged in multiple strips along the longitudinal direction with gaps capable of capturing floating objects, and the floating object conveyor 15 is a scraper that moves between the wire rods and scrapes off the captured floating objects. 15a.

The bottom of the rear washing tank 2 includes a front bottom 2a that slopes downward in the flow direction, and a rear bottom 2b that continuously slopes upward in the flow direction from the lowest end of the front bottom 2a.
The carrying-in end 1 of the floating matter carrying-out means 13
3a is appropriately spaced from the front bottom portion 2a. Therefore, sediment with heavy specific gravity such as sand descends along the front bottom 2a and moves to the rear bottom 2b.

At the rear bottom portion 2b of the rear cleaning tank 2, a cleaning object carrying means 16 consisting of a screen conveyor is disposed along an inclined surface in order to carry sand and the like out of the tank.

An overflow port 17 is provided on the side wall of the downstream washing tank 2 on the downstream side of the suspended matter carrying out means 13 to keep the water level in the tank constant. A storage tank 18 is provided in series.
The overflow water storage tank 18 is connected to the inlet of the overflow water supply pipe 6, and the supply pipe 6 is connected to a pump P for pressure-feeding the overflow water in the overflow water storage tank 18 to the front-stage cleaning tank 1. The overflow water supply means 19 is provided.

Note that 20 and 21 are conveyors disposed at the discharging end of the floating matter discharging means 13 and the discharging end of the object to be cleaned discharging means 16, respectively.

Next, the operation of the above embodiment will be described.

Washing water is supplied to the downstream cleaning tank 2 from the water supply pipe 12, and overflow water from the downstream cleaning tank 2 is stored in an overflow water storage tank 18.
is stored in the first stage cleaning tank 1 by the supply means 19.
supplied to

Cleaning in this pre-stage cleaning tank 1 is carried out by introducing a certain amount of the object to be cleaned into this tank by a carry-in conveyor 8,
As described above, stirring is carried out by the stirring blade 5 while supplying overflow water. In this cleaning process,
The deposits on the object to be cleaned are overflowed and drained from the drain port 7.
In addition, the objects to be cleaned that adhere to the bar screen 4 are
Scrape it off using a scraping means (not shown) so as not to obstruct the flow of overflow water.

After cleaning for a certain period of time, the opening/closing lid 1 of the discharge port 9 is
0 is opened and the objects to be cleaned in the tank are thrown into the latter stage cleaning tank 2. Due to this falling force, the objects to be cleaned are diffused into the latter-stage cleaning tank 2 and subjected to the cleaning action, and are separated into objects with a light specific gravity and objects with a heavy specific gravity. Sieve residue and the like having a light specific gravity float and move within the tank, are captured by the screen 14 of the suspended matter carrying-out means 13, and are carried out of the tank by the floating matter carrying-out conveyor 13. Also, screen 14
The fine suspended matter that has passed through reaches the overflow port 17, from which it is drained together with the overflow water. On the other hand, inorganic substances with heavy specific gravity such as sand settle on the rear bottom 2b of the tank, and are therefore carried out of the tank by the object to be cleaned carrying means 16.

In this way, since the object to be cleaned to be washed and carried out in the latter-stage cleaning tank 2 is pre-processed and cleaned in the former-stage cleaning tank 1, the cleaning effect can be increased. Moreover, since the overflow water from the post-stage cleaning tank 2 is used for this pre-treatment cleaning, a large amount of water can be saved. That is, although the overflow water from the latter stage cleaning tank 2 is slightly contaminated due to diffusion and washing, it is used for pre-processing cleaning of the dirty objects to be cleaned, so that the objects to be cleaned can be cleaned to a considerable extent in advance. This prevents the washing water in the tank 2 from being extremely contaminated during the subsequent washing.
Therefore, the overflow water supplied from the rear cleaning tank 2 to the front cleaning tank 1 is also relatively clean, and the cleaning effect is further increased because potential energy is used to diffuse the objects to be cleaned. be able to.

By the way, in this embodiment, two pre-stage cleaning tanks 1 and 1' are used, so that continuous cleaning can be achieved by using them alternately, such as loading the object to be cleaned into the other while cleaning one of them. can be processed.

In addition, if the water supply pipe 12 of the latter-stage cleaning tank 2 is provided on the discharge end side of the cleaning object discharge means 16, and the clean water is brought into contact with the sand etc., it is carried out of the tank.
Furthermore, the cleaning effect can be improved, and sand etc. can be carried out in an extremely sanitary manner. Also, 1
For the carrying out means 3 and 16, other means than those shown may be used. Other means such as a slide valve may be used for the opening/closing lid 10 provided at the outlet at the bottom of the front-stage cleaning tank.

[Effect of idea]

In summary, the present invention provides the following excellent effects.

Since it is a batch type in which a fixed amount of items to be cleaned is cleaned in the front-stage cleaning tank and discharged at once, the cleaning time can be adjusted freely depending on the amount of dirt.

In addition, the three functions of the screen tank, stirring tank, and rinsing tank are consolidated into one front-stage cleaning tank, making it compact and convenient for installation in limited installation space such as existing treatment plants.

In particular, when carrying objects to be cleaned from the front-stage cleaning tank to the rear-stage cleaning tank, potential energy is used to drop the objects into the tank, which allows the objects to be effectively dispersed and further increases the cleaning effect. can be done.

Overflow water from the downstream cleaning tank, which should normally be treated as wastewater, is effectively used for pre-treatment cleaning, making it possible to significantly save water.

Both sand and sieve residue (screen residue) can be washed.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of a cleaning device, and FIG. 2 is a plan view thereof. In the figure, 1 and 1' are the front-stage cleaning tank, 2 is the rear-stage cleaning tank, 5 is the stirring blade, 9 is the discharge port, 13 is the suspended matter transport means, 16 is the object to be cleaned transport means, and 19 is the overflow water supply means. be.

Claims (1)

[Scope of utility model registration request] A stirring blade is installed in the tank that stores the input sieve residue, sediment, etc. and overflow water supplied from the latter stage washing tank, and a discharge port with a screen is provided at the top, and a discharge port for the material to be cleaned is provided at the bottom. , a front-stage cleaning tank that discharges the objects to be cleaned in the tank at once by opening this discharge port, and a front-stage cleaning tank provided below the discharge port of the front-stage cleaning tank, from which the objects to be cleaned that have been discharged and fallen are washed with washing water. A second stage cleaning tank for cleaning while supplying water; a floating matter removal means provided in the second stage cleaning tank for transporting floating matter out of the tank; and an overflow water supply means for supplying overflow water overflowing from the latter washing tank to the above-mentioned front washing tank. cleaning equipment.