JPS6357111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning device for sedimentation, sieve residue, etc., and in particular, the interior of the primary cleaning tank is divided into a plurality of parts to perform primary cleaning continuously, and this cleaning water is is transferred to the secondary washing tank, making it possible to continuously process the objects to be washed, increasing the crushing power and cleaning efficiency of the objects to be washed, and further saving water significantly. Related to cleaning equipment for residue, etc.

In general, a device for stirring and washing sediment, sieve residue, etc. scraped up from a settling pond of a sewage treatment plant or a pumping station in a washing tank while supplying washing water is shown in Japanese Patent Publication No. 56-33144, for example. As is already known. This is because the sediment, sieve residue, etc. are contaminated, and it is unhygienic to dispose of them directly in a landfill, etc., so cleaning is attempted as a pretreatment.

However, in the conventional device, the cleaning process is carried out in one tank formed integrally, so the dirt attached to the sediment, sieve residue, etc., spreads into the tank and the cleaning water is drained. As a result of the contamination, the objects to be cleaned discharged from the tank were still unhygienic. Also,
The only way to increase the cleaning effect is to increase the amount of cleaning water supplied, which is uneconomical.

Furthermore, because the cleaning water is stirred in one large-capacity tank, the stirring power is weak, and solid objects to be cleaned (human excrement, etc.) remain unbroken, which is an inconvenience.

Therefore, in order to solve the above-mentioned problems, the present applicant filed an earlier application [Utility Application No. 58-26982 (Utility Model Application No.
135144)] proposed a new cleaning device.

This device forms a primary cleaning tank and a secondary cleaning tank as cleaning tanks, and uses the overflow water from the secondary cleaning tank as the primary cleaning water, resulting in significant water savings and The stirring power is also increased, which solves the above-mentioned problems to some extent.

However, since the above-mentioned apparatus is provided with only one primary cleaning tank, batch processing has to be carried out, and continuous operation is not possible, resulting in a decrease in equipment operating rate.

For this reason, it is conceivable to form a plurality of primary cleaning tanks, but in this case there is a problem that the apparatus becomes larger.

Furthermore, by forming the primary cleaning tank and the secondary cleaning tank separately, the stirring power of the primary cleaning tank is temporarily increased. It has been found that there are cases in which such debris becomes entangled and becomes a large clump, and as a result, sufficient stirring and crushing power cannot be exerted.

The present invention has focused on the above-mentioned problems and has been devised to effectively solve the problems.

An object of the present invention is to form a primary cleaning tank and a secondary cleaning tank in series, and divide the inside of the primary cleaning tank into a plurality of parts by rotating blades to transfer objects to be cleaned into the secondary cleaning tank. This method enables continuous processing of the objects to be washed, increases the crushing power and cleaning efficiency of the objects to be washed, and furthermore enables significant water savings. We provide cleaning equipment such as:

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, as shown in Figures 1 and 2, this cleaning device receives drainage or overflow water from the secondary cleaning tank 2, and uses this water as cleaning water for primary cleaning of sediment, sieve residue, etc. It mainly consists of a cleaning tank 1 and a secondary cleaning tank 2 which is connected to the cleaning tank 1 and which washes the primarily washed sediment, sieve residue, etc. discharged from the primary cleaning tank 1 with fresh clear water. ing. In the illustrated example, one side of one horizontally long tank body 3 is partitioned off by blades 4, which are the characteristics of the present invention.
A secondary cleaning tank 1 and a secondary cleaning tank 2 are separated.
Therefore, as will be described later, by opening (rotating) this blade 4, the objects to be cleaned in the primary cleaning tank 1 will be introduced into the secondary cleaning tank 2.

The primary cleaning tank 1 is formed as a semicircular tank whose horizontal cross section is approximately semicircular. At the center of this semicircular primary cleaning tank 1, that is, at the center of curvature of the semicircle, there is a rotating shaft 5 that stands up from the bottom of the tank body.
is provided. A plurality of blades 4 extending radially toward the inner wall 6 of the tank body are attached and fixed in the axial direction to the rotating shaft 5, and the inside of the primary cleaning tank 1 is divided into a plurality of parts. A plurality of fan-shaped cleaning sections 7 and transfer sections 51 are formed.
In the illustrated example, a total of six blades 4 are provided with their center angles spaced apart by 60 degrees, and therefore, two to three divided cleaning sections 7 are always formed. . The rotary shaft 5 is provided with a blade drive device 8 such as a motor.
By intermittently or continuously driving the blades 4 to rotate at low speed, the blades 4 can be sequentially rotated in the directions of the arrows. Further, a seal member 9 made of synthetic rubber is attached to the tip of each blade 4 along the vertical direction, and as the blade 4 rotates, this member moves while slidingly contacting the inner wall 6. Incidentally, this sealing member 9 may also be provided at the lower end of the blade 4, whereby the objects to be cleaned can be discharged to the secondary cleaning tank side more reliably.

A stirring blade 10 is provided at the lower part of the inner wall 6 for stirring the object to be cleaned to perform primary cleaning. It is recessed outward. The stirring blade 10 is connected to a stirring blade driving device 11. In the illustrated example, one unit is provided at the center of the arc-shaped tank wall, but in order to increase the stirring power, two or more units may be provided at a predetermined interval in the circumferential direction as shown by the imaginary line. You can do it like this.

In addition, a drain port 13 having a bar screen 12 is formed in the upper part of the inner wall 6 to drain overflow water containing dirt from inside the tank, and a drainage device connected to this drain port 13 is formed to drain the overflow water. 14 to a sand settling pond or the like (not shown). A charging conveyor 15 is provided above the primary cleaning tank 1 for charging the materials to be cleaned, such as sand and sieve residue, into the tank.

On the other hand, inside the secondary cleaning tank 2, a floating matter transporting means 16 is provided for transporting 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 16 is carried out from the primary cleaning tank 1 to the secondary cleaning tank 2.
A screen 17 that is inclined upward along the flow direction toward the tank and is arranged to block the flow, and a floating matter carry-out conveyor that is arranged along this in order to carry out the floating matter captured by the screen 17 out of the tank. 18
It is composed of.

The screen 17 is made of wire rods arranged in multiple strips along the longitudinal direction with gaps capable of trapping floating objects. Further, the floating object conveyor 18 has a scraper 19 that moves between the wire rods in the longitudinal direction to scrape off the captured floating objects, and is driven by a carrying out conveyor drive device 20 provided at the unloading end side. I'm starting to get it.

In addition, the bottom of the secondary cleaning tank 2 is connected to the primary cleaning tank 1.
The floating matter carrying out means 16 is composed of a front bottom part 22 connected to a flat bottom wall 21 and inclined downward, and a rear bottom part 23 inclined upward from the lowest part of the front bottom part 22 along the flow direction. carry-in end 16a of
is spaced upwardly from the front bottom portion 22.

In the rear bottom part 23 of the secondary cleaning tank 2, the carry-in end 24a is located at the lowest end, and a cleaning object such as a screw conveyor is installed along the slope in order to discharge settled sand, etc. to the outside of the tank. A material delivery means 24 is provided, which can be rotated by a screw conveyor drive device 25 provided at the delivery end.

A clear water supply nozzle 26 for supplying clear water for performing secondary washing is provided on the upstream side of the floating matter transporting means 16 in the secondary washing tank 2,
A clear water supply pipe 27 is connected to this.

Further, a discharge port 28 is provided in the secondary cleaning tank on the downstream side of the suspended matter carrying out means 16 or on its inner wall, located below the cleaning liquid level, for sucking and discharging the cleaning liquid in the tank. A circulation passage 31 in which a circulation pump 29 and a circulation valve 30 are provided is connected to the discharge port 28 . The tip of the circulation passage 31 is connected to an injection nozzle 32 located approximately at the lowest end in the secondary cleaning tank 2, and all or part of the cleaning water that has been discharged once is circulated and re-injected into the secondary cleaning tank 2. It is designed to be introduced into the lowest end of the cleaning tank 2.

Further, a primary cleaning water supply pipe 33 is branched from the circulation passage 31 between the circulation pump 29 and the circulation valve 30, and after an on-off valve 34 is opened on the way, the inner wall of the primary cleaning tank 1 is Cleaning water supply port 3 provided in 6
It is connected to 5. As a result, part or all of the waste water from the secondary cleaning tank, which is relatively free of dirt, can be used as a cleaning liquid for the primary cleaning tank 1. In the illustrated example, only one washing water supply port 35 is shown, but the number is not limited to this and a plurality may be provided, or the stirring blade 10
The cleaning efficiency may be improved by providing the cleaning area corresponding to the position of the cleaning area.

In the figure, numerals 36 and 37 are conveyors disposed at the discharging end of the floating matter discharging means 16 and the discharging end of the object discharging means 24, respectively, and 38 is a drain valve.

Next, the operation of the present invention configured as described above will be described.

First, clear water (technical water) is supplied as washing water to the secondary washing tank 2 from a clear water supply pipe 27, and at the same time relatively clean washing water is sequentially supplied from a drain port 28 provided on the downstream side of the tank. is suctioned and discharged and flows through the circulation passage 31. A part of this cleaning water is further pumped by the circulation pump 29 and supplied again into this tank from the injection nozzle 32 provided at the lower end of the secondary cleaning tank 2, and the remaining cleaning water is used for cleaning the primary cleaning tank 1. The water is transferred through the primary wash water supply pipe 33, and
Next, it is supplied into the cleaning tank 1.

On the other hand, in the primary cleaning tank 1, the blade 4 rotates intermittently or continuously at a low speed about the rotating shaft 5. As the blade 4 moves in the direction of the arrow, an appropriate amount of the object to be cleaned is fed from the feeding conveyor 15 into each of the divided cleaning sections 7, and the object to be washed is fed into the area formed by the stirring blades 10. The primary cleaning is performed by stirring with a vortex. If only one stirring blade 10 is provided as in the illustrated example, the inside of the cleaning section on the side in the rotating direction of the blade will be sequentially stirred, but by providing two stirring blades as shown in the imaginary line, stirring will be performed twice. Can be done.

In particular, by dividing the inside of the tank into multiple parts to reduce the amount of material to be washed at one time in the washing section, stirring power and crushing power are increased, ensuring that solids (human excrement, etc.) are crushed. and the cleaning efficiency can be improved.

Then, by rotating the blade 4 by 60 degrees, the object to be cleaned in the next cleaning section 7 is agitated and washed by the stirring blade 10, and at the same time, the object to be cleaned in the next cleaning section 7, which has been cleaned, is stirred and washed.
The objects to be cleaned (including cleaning water) inside are transferred to the secondary cleaning tank 2. In other words, the cleaning section 7 containing the objects to be cleaned that have been subjected to the primary cleaning is transferred to the transfer section 51. This transfer of the object to be cleaned is also performed by a jet stream from the stirring blade 10 or a jet stream from the cleaning water outlet 35.

By sequentially rotating the blades 4 in this way, each cleaning section can be cleaned continuously,
Moreover, the discharge to the secondary cleaning tank side can also be performed quantitatively and continuously.

In addition, the vortex formed by the stirring blades 10 tends to curl up and harden garbage such as vinyl, but this vortex is periodically destroyed by the rotation of the blade 4 across the communication position with the vortex chamber 52. Therefore, the formation of dust particles can be prevented, and the agitation cleaning effect can be further improved.

Furthermore, overflow water is discharged from the discharge port 13 to maintain a constant water level in the tank, but there is a tendency for floating matter to be caught on the bar screen 12 provided at this and obstruct the flow of the overflow water. arise. However, since this trapped floating matter is scraped off by the sealing member 9 at the tip of the blade, the above-mentioned inconvenience does not occur.

On the other hand, by discharging the items to be cleaned in the primary cleaning tank 1 to the secondary cleaning tank 2, the residual dirt in the items to be cleaned is diffused, and the items to be cleaned include items with light specific gravity (floating items) and heavy items. (sand, etc.) When discharging the object to be cleaned, clear water is supplied from the cleaning water supply nozzle 26, and cleaning water from the downstream side of the tank is circulated and supplied from the jet nozzle 32, thereby increasing the diffusion cleaning efficiency of the residual dirt. Can be done.

The sieve residue, etc., which has a light specific gravity, floats in the tank and moves in the discharge direction, is captured by the screen 17 of the suspended matter conveyance means 16, and is scraped off by the scraper 19 while being carried out of the tank by the suspended matter conveyor 18. is discharged to.

On the other hand, inorganic substances with heavy specific gravity (sand, etc.) are secondarily washed with clear water and settle to the rear bottom part 23 of the tank, and are discharged to the outside of the tank by means of carrying out the cleaning object 24 consisting of a screw conveyor. Ru.

In this way, since the objects to be cleaned to be cleaned in the secondary cleaning tank 2 are subjected to primary cleaning or pre-treatment cleaning in the primary cleaning tank 1 in advance, the cleaning effect can be improved. A portion of the waste water from the secondary cleaning tank 2, which has relatively little dirt, is used as cleaning water, resulting in significant water savings. That is, although the waste water from the secondary cleaning tank 2 is slightly dirty, since it is used for the primary cleaning of heavily soiled items, the items to be cleaned can be cleaned to a considerable extent in advance. In the secondary cleaning, the cleaning water in the tank is not extremely contaminated. Therefore, since the cleaning water supplied into the primary cleaning tank 1 is also relatively clean, the synergistic effect of these can increase the cleaning effect and make it possible to save a large amount of water.

In the above embodiment, when a plurality of stirring blades 10 (two units) are provided as shown in the imaginary line in FIG. As shown in the figure, one stirring blade driving device 11 may be provided, and the driving gear 39 and driven gears 40, 40 connected to each stirring blade 10 may be rotated by this to drive the stirring blade 10, Further, the number of stirring blades is appropriately increased or decreased depending on the processing capacity.

In summary, according to the present invention, the following excellent effects can be achieved.

(1) Sediment, sieve residue, etc. are first washed in the primary washing tank using waste water from the secondary washing tank, and then washed for a second time in the secondary washing tank, so that they are not discharged. The cleaning effect can be increased because dirt does not adhere to sand, etc., and running costs can be lowered since a large amount of water can be saved.

(2) Since the inside of the primary cleaning tank is divided into a plurality of parts for agitation cleaning, the cleaning water is more vigorously agitated and the cleaning effect can be increased.

(3) The rotating blade can prevent the formation of clumps of dust, etc., and in conjunction with the above items (1) and (2), it is possible to significantly increase the cleaning effect.

(4) As mentioned above, since the stirring power can be increased, solids (human excrement, etc.) can be reliably crushed, which is sanitary.

(5) Also, since the primary cleaning tank is divided into multiple parts and the objects to be cleaned are transferred and discharged to the secondary cleaning tank, continuous processing operation is possible, unlike the conventional batch processing method. The equipment operating rate is improved and a large amount of objects to be cleaned can be processed.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a cleaning device according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a partial plan view showing a modified example. In the figure, 1 is the primary cleaning tank, 2 is the secondary cleaning tank, and 4 is the primary cleaning tank.
is a blade, and 52 is a swirl chamber.

Claims (1)

[Claims] 1. A primary cleaning tank that primarily cleans items to be cleaned, such as sediment and sieve residue, while supplying cleaning water; A secondary cleaning tank that performs secondary cleaning by adding water, and
It extends radially from a rotating shaft provided upright in the center of the secondary cleaning tank, and divides the inside of the tank into a cleaning section and a transfer section open to the secondary cleaning tank side. a vortex chamber having a blade for transferring the cleaning water containing the object to be cleaned around the rotating shaft, and a stirring blade that is provided in communication with the outer periphery of the cleaning section and for stirring the inside of the cleaning section; A cleaning device for sand, sieve residue, etc., characterized by being equipped with the following.