JPS634457B2 - - 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-treatment 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.

[Prior Art] For example, a device for cleaning sieve residue, sediment, etc. scraped up from a settling basin of a sewage treatment plant or a pumping station by stirring it in a cleaning tank while supplying cleaning water is disclosed in, for example, the Japanese Patent Publication No. 1983-
This is already known, as seen in Publication No. 33144, Publication of Utility Model Application Laid-open No. 54-72866, etc.

This is because the sieve residue, sediment, etc. are contaminated, and it is unhygienic to dispose of them directly in a landfill, etc., so cleaning is attempted as a pretreatment.

[Problems to be solved by the invention] However, in the case of the conventional cleaning device, 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.

Therefore, the present invention was devised to solve the above-mentioned problems, and its purpose is to provide a cleaning device for sieve residue, sediment, etc., which can increase the cleaning effect and significantly save water. .

[Means for Solving the Problems] In order to achieve the above object, the present invention divides the horizontally long tank body into front and rear parts with a door to form a front-stage cleaning tank and a rear-stage cleaning tank independently. and an overflow water supply means that connects a water supply pipe that supplies cleaning water to the downstream cleaning tank, and supplies overflow water from the downstream cleaning tank to the upstream cleaning tank, and a conveyor that throws a certain amount of objects to be cleaned; A stirring blade that stirs and washes the objects to be cleaned that have been put into the washing tank, and a drain port that drains the washed wastewater in the washing tank to the outside of the tank are provided, and after a certain period of time has elapsed in the latter washing tank, the door is opened and the former washing tank is opened. A means for transporting objects to be cleaned that has settled to the bottom of the objects discharged from the cleaning tank and diluted and washed, and a floating object transporter that collects floating objects and transports them out of the tank. The means are provided.

[Operation] A certain amount of the object to be cleaned is put in the pre-washing tank and is stirred and washed for a certain period of time. At this time, cleaning water and overflow water from the latter cleaning tank are supplied into the first stage cleaning tank, while cleaning waste water is overflowing and drained outside the tank, thereby increasing the cleaning effect.

After cleaning in the front-stage cleaning tank, the door is opened and the object to be cleaned is discharged into the rear-stage cleaning tank, and the object to be cleaned is diluted and washed with the washing water in the rear-stage cleaning tank. While cleaning water is supplied to the latter-stage cleaning tank, cleaning wastewater is overflowed and drained, and since the workpieces that have been previously cleaned in the earlier-stage cleaning tank are cleaned, the cleaning effect is extremely effective. . Of the objects to be washed thus washed, the washed objects and floating objects that have settled at the bottom of the latter-stage cleaning tank are carried out of the tank and collected.

[Embodiment] 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 washing tanks for washing sieve residue, sediment, etc. while supplying overflow water from the latter-stage washing tank 2, and in the illustrated example, there is one horizontally long tank. By partitioning the inside of the body 3 with doors 4, 4', front-stage cleaning tanks 1, 1' and rear-stage cleaning tanks 2 are arranged side by side. In addition, doors 4, 4' are provided in the portion where the front-stage cleaning tanks 1, 1' and the rear-stage cleaning tank 2 communicate with each other through hinges 6, 6' so as to be openable and closable.
It is now ready to be transported. Both front stage cleaning tanks 1,
1' have the same configuration and are used alternately, so only one will be explained. A rotary stirring blade 7 is provided in the front-stage cleaning tank 1, and a cleaning water supply pipe for supplying cleaning water. 8 and an overflow water supply pipe 9 for supplying overflow water from the latter stage cleaning tank 2 are connected. In addition, the front-stage cleaning tank 1 has a drain port 10 equipped with a bar screen 5 for draining the supplied overflow water while stirring and cleaning it.
is provided, and a conveyor 11 is provided above for introducing the sieve residue, sediment, etc. into the tank.
is provided. The bottom 1a of the front-stage cleaning tank 1 configured in this manner is inclined downward toward the adjacent rear-stage cleaning tank 2, so that sand, etc. with a heavy specific gravity among the objects to be cleaned can be easily conveyed to the rear-stage cleaning tank 2. ing.

On the other hand, in the second-stage cleaning tank 2, a floating matter carrying-out means 12 is provided for carrying out floating matter (washing waste) having a light specific gravity, such as sieve residue, to the outside of the tank. This floating matter carrying out means 12 includes a screen 13 which is arranged to be inclined upward in the flow direction from the front stage cleaning tank 1 to the rear stage cleaning tank 2 and to block this flow.
A floating matter conveyor 14 is disposed along the tank to transport floating matter captured by the tank out of the tank. The screen 13 is made of wire rods arranged in multiple strips along the longitudinal direction with gaps capable of capturing floating matter, and is connected to the floating matter conveyor 14.
has a scraper 14a that moves between each wire rod to scrape off captured floating matter.

By the way, the bottom of the rear cleaning tank 2 includes a front bottom 2a connected to the bottom 1a of the front cleaning tank 1 and inclined in the same direction, and a rear side inclined upward from the lowest part of the front bottom 2a along the flow direction. The carrying-in end 12a of the floating matter carrying-out means 12 is appropriately spaced from the front bottom part 2a. and,
At the rear bottom portion 2b of the rear-stage cleaning tank 2, an object-to-be-cleaned conveyance means 15 consisting of a screw conveyor is disposed along an inclined surface in order to convey settled sand and the like out of the tank.

An overflow port 16 for keeping the water level in the tank constant is provided on the side wall of the downstream washing tank 2 on the downstream side of the suspended matter carrying out means 12. A storage tank 17 is provided in series. The overflow water storage tank 17 is connected to the inlet of the overflow water supply pipe 9, and the overflow water in the overflow water storage tank 17 is transferred to the first stage cleaning tank 1.
A pump P for pressure-feeding water is provided, and constitutes overflow water supply means 18.

Note that 19 and 20 are conveyors disposed at the discharge end of the floating matter conveyance means 12 and the discharge end of the object to be cleaned conveyance means 15, respectively. In addition, a water supply pipe 21 for supplying clean water to the downstream cleaning tank 2 is provided.
is connected.

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

Washing water is supplied from the water supply pipe 21 to the second stage cleaning tank 2, and overflow water that overflows from the overflow port 16 of the second stage cleaning tank 2 is stored in the overflow water storage tank 17, and the supply means 1
It is supplied to the front-stage cleaning tank 1 via 8. The cleaning in this pre-stage cleaning tank 1 is carried out using a conveyor 1 inside this tank.
1, a certain amount of the object to be cleaned is put in, and stirring is carried out by the stirring blade 7 while supplying overflow water as described above. During this cleaning process, the dirt adhering to the object to be cleaned is drained out of the drain port 10. Further, objects to be cleaned adhering to the bar screen 5 are scraped off by scraping means (not shown) so as not to obstruct the flow of overflow water. After cleaning for a certain period of time, the door 4 is opened and the front and rear cleaning tanks 1,
2 are communicated with each other, and the objects to be cleaned in the front-stage cleaning tank 1 are discharged to the rear-stage cleaning tank 2. As a result, the remaining dirt in the object to be cleaned is diffused, and the object to be cleaned is divided into objects with a light specific gravity and objects with a heavy specific gravity. By supplying cleaning water from the cleaning water supply pipe 8 of the front-stage cleaning tank 1 when discharging and carrying out the object to be cleaned, it is possible to improve the diffusion cleaning effect of the residual dirt. Then, the sieve residue and the like having a light specific gravity float in the tank and move in the discharge direction, are captured by the screen 13 of the suspended matter carrying-out means 12, and are carried out of the tank by the floating matter carrying-out conveyor 14. Further, the thin floating matter that has passed through the screen 13 reaches the overflow port 16, from which it is drained together with the overflow water. On the other hand, inorganic substances with heavy specific gravity (sand, etc.)
Since it settles on the rear bottom 2b inside the tank, it is carried out of the tank by the cleaning object carrying means 15. In this way, since the cleaning material to be washed and discharged in the latter-stage cleaning tank 2 is pre-processed and cleaned in the former-stage cleaning tank 1, the cleaning effect can be improved. 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 cleaning, since this water is used for pre-treatment cleaning of the dirty objects to be cleaned, it is possible to clean the objects to be cleaned to a considerable extent in advance. Therefore, the washing water in the tank 2 will not become extremely contaminated during the subsequent washing. Therefore,
Since the overflow water supplied into the front-stage cleaning tank 1 is also relatively clean, the cleaning effect can be increased due to the synergistic effect.

By the way, since two pre-stage cleaning tanks are provided in the embodiment, continuous cleaning can be performed by using them alternately, such as loading the object to be cleaned into the other while cleaning one of them. Can be done.

Further, since the front and rear cleaning tanks 1, 1', and 2 are formed by partitioning the inside of one tank body 3, it is possible to make the apparatus more compact and save space.

In addition, if the water supply pipe 21 of the latter-stage cleaning tank 2 is provided on the discharge end side of the object to be cleaned discharge means 15 so that fresh water is brought into contact with the sand, etc. and carried out of the tank, the cleaning effect can be further improved. sand, etc. can be carried out in an extremely sanitary manner. Also, 12,
As the carrying out means 15, other means than shown may be used. Furthermore, the doors 4, 4' of the front-stage cleaning tanks 1, 1' may be of the type shown in FIG.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

(1) Washing water and overflow water from the latter washing tank are supplied to an independent front-stage washing tank through a door, and the washing wastewater is drained outside the tank, and a certain amount of objects to be cleaned is agitated and washed for a certain period of time. After that, open the door and discharge the items to be cleaned from the front cleaning tank to the rear cleaning tank.
Since the washing water is supplied in the latter washing tank and the washing wastewater is drained overflowing to the above-mentioned former washing tank, and the object to be washed is diluted and washed with clear water, a remarkable washing effect can be exhibited.

(2) Overflow water from the downstream cleaning tank, which should normally be treated as wastewater, is effectively used for pre-treatment cleaning, contributing to significant water savings.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of the cleaning device, FIG. 2 is a plan view of the same, and FIG.
The figure is a plan view showing another embodiment of the method for attaching the partition door. In the figure, 1 and 1' are front stage cleaning tanks, 2 is rear stage cleaning tank,
3 is the tank body, 4, 4' are the doors, 7 is the stirring blade, 8, 21
is a water supply pipe, 10 is a drain port, 11 is a conveyor, 12
15 is a means for carrying out floating matter; 15 is a means for carrying out objects to be cleaned; 1
8 is an overflow water supply means.

Claims (1)

[Claims] 1 The horizontally long tank body is partitioned into front and rear parts with doors to form separate compartments into a front-stage cleaning tank and a rear-stage cleaning tank, and a water supply pipe that supplies cleaning water to these front- and rear-stage cleaning tanks is connected to the front-stage cleaning tank. an overflow water supply means for supplying overflow water from the latter-stage cleaning tank, a conveyor for introducing a certain amount of objects to be cleaned, an agitation blade for stirring and cleaning the thrown-in objects to be cleaned, and a conveyor for supplying overflow water from the latter-stage cleaning tank to A drain port is provided to drain washed wastewater out of the tank, and after a certain period of time has elapsed, the door is opened and the waste water discharged from the front washing tank is diluted and washed with the washing water in the latter washing tank. A sieve characterized by being provided with a means for transporting objects to be washed that has settled at the bottom of the material to be washed out of the tank, and a means for transporting floating objects that collects floating objects and transports them out of the tank. Cleaning equipment for residue, sediment, etc.