JPH01171659A - Apparatus for washing screen residue - Google Patents

Abstract

PURPOSE:To dissolve soluble components of screen residues such as human feces, etc., securely in washing water and to enhance washing efficiency for the screen residues by crumbling the screen residues raked up with a raking device by shearing with a crushing roll while the residues flow down through a trough and then feeding the crushed product to a washing tank. CONSTITUTION:Screen residues raked up by a raking device 2 from a screen into a trough 3 flow down through the trough 3 together with washing water fed to the trough 3. When the screen residues reach a position of a crushing roll 61 where the speed of rotation is above the flowing down speed of the residues, the residues are bitten by an external peripheral surface or protruded stripes on the rotating crushing roll 61, where the residues are sheared and crushed and transported forcibly to between the trough 3 and the crushed roll 61 and crumbled by the pressure of the roll. The residues crumbled securely by shearing and crushing of the crushing roll 61 are flowed down after mixing with the washing water in the trough 3, and charged to a washing tank 4, where the residues are washed with ejected washing water and loosened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for reliably cleaning sludge collected at a sewage treatment plant or the like.

[Conventional technology and its problems]

Garbage contained in sewage at sewage treatment plants, pumping stations, settling ponds, etc. is removed using screens and scraping devices installed in the waterways. This sludge contains a large amount of sludge-like substances, human feces, and other soluble organic matter, and also has a very high water content. Therefore, when such waste is disposed of, it is unhygienic as sewage and fine organic matter may drip during transportation, or bad odors may be scattered all around. In addition, sewage flows into groundwater and rivers, causing pollution. Furthermore, it is difficult to incinerate the residue and scum due to their high moisture content, and the cost is high. Furthermore, even if the waste is directly dumped, there are a number of drawbacks, such as the difficulty of finding a suitable location near a city due to bad practices.

In addition, the recovered residue contains a large amount of substances that cannot be easily crushed by washing with water alone. For example, human excrement is stirred in washing water t'-1! Just cleaning it will not crush it.

The purpose of the present invention is to ensure that easily crushed organic matter such as human excrement is pre-cleaned by crushing it into stone crusts before being introduced into the cleaning tank.

[Means for solving problems]

A trough in which the residue scraped up by the rake device flows down together with washing water, a cleaning tank adjacent to this trough, and a trough located approximately at the end of the trough and pressed into the trough with a required pressure, and in which the residue flows down. It consists of a residue crushing device equipped with rotating crushing rollers for shearing and crushing.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The residue cleaning apparatus according to the present invention will be explained below based on the illustrated embodiments.

In the figure, reference numeral 1 denotes a screen installed in a sewage treatment plant, etc. This screen 1 is equipped with a rake device 2, and the particles captured by the screen 1 are raked and recovered by the rake device 2. Since the screen 1 and rake device 2 are the same as the mechanisms conventionally employed, detailed explanation thereof will be omitted.

Reference numeral 3 denotes a trough from which the residue scraped and collected from the screen 1 by the rake device 2 is discharged.This trough 3 is used for discharging the residue scraped up and collected from the screen 1 by the rake device 2, and when two or more rows of screens 1 are arranged in parallel, this trough 3 is used for discharging the residue from the screen 1. 1
A cleaning tank 4 is installed adjacent to the pond of the sewage treatment plant where the screen 1 is installed, and the tip of the trough 3 reaches above one end of the cleaning tank 4. and the trough 3 is inclined so that the seed side is lower. As a result, the residue scraped up and discharged into the trough by the screen and relay equipment naturally flows down to the washing tank due to the slope of the trough 3 and the washing water supplied from the upstream side of the trough 3. 5 is a pipe that supplies cleaning water.

And this trough 3 wash? ! A sludge crushing device 6 is installed near the measuring end of the tank so that it flows down inside the trough and crushes the sludge.

A cleaning nozzle 7 is disposed above the cleaning tank 4, and the cleaning water is sprayed at high pressure into the tank. In addition, if necessary, a pulsator or other agitator will be installed in the cleaning tank.

8 is a discharge means for discharging the washed residue in the washing tank 4, and the washed residue scraped up by this discharge means 8 is then supplied to the dewatering means 9, where it is dehydrated as desired. It is something that is treated and discharged.

The sludge crushing device 6 is shown in detail in FIG. 3 and below.

In the embodiment shown in FIGS. 3 to 5, the bottom surface of the trough 3 is bent into a U-shape, and 20. A roller 6] is rotatably supported at the tip of a swing arm 62, and the base end of the swing arm 62 is swingably supported by a bearing 63 provided in the trough 3 or a frame (not shown). The roller 61 is then rotated by a drive device 64 installed on the swinging member 62 via a power transmission means 65 such as a chino or a gear.

The rotational direction of the crushing roller 6I is the same as the direction of flow of the scum flowing down in the trough, and the crushing roller is rotated so that the circumferential speed of the crushing roller is faster than the falling speed of the clear stream. Further, in order to ensure that the residue flowing down in the trough is bitten by the crushing roller 61, a large number of protrusions 66 may be provided on the outer periphery of the crushing roller 61.

In the embodiments shown in FIGS. 3 to 5, the sludge flowing down in the trough is crushed by crushing rollers, which are pressed by the weight of the sludge crushing device. .

In addition, as a method to further increase the pressing force of the crushing roller, the eighth
The embodiment shown in the figure can be considered. In this system, a spring 10 is attached to the base end of the swinging arm, and the crushing roller is pressed against the trough by the pressure obtained by adding the pressure of this spring to the weight of the sludge crushing device.

In addition, the embodiment shown in FIGS. 6 and 7 has a crushing roller 61.6.
1 are arranged in two rows in front and back in the direction of flow down the trough.
The rest is the same as the embodiment shown in FIG. 3, and both of the two stages of crushing rollers 61, 61 are driven by the same drive device. Note that the shape of the trough is not limited in any of the embodiments, and a U-shape, a U-shape, a V-shape, etc. can be adopted as appropriate.

In the embodiment of the present invention, the residue raked into the trough 3 by the rake device 2 from the screen flows down the trough together with the wash water supplied into the trough. When the residue comes to the position of the crushing roller 61 which is rotating at a rotational speed higher than the flow rate of the residue, the rotating crushing roller 6
It is bitten by the outer circumferential surface of No. 1 or the protrusion 66, is sheared and crushed, and is forcibly sent between the trough and the crushing roller, and then is compressed by the pressing force of this roller. This human excreta-containing sludge is reliably crushed by shearing and crushing by the crushing rollers, mixed with the washing water in the trough, and further flowed down the trough and thrown into the washing tank. The scum forcibly crushed in this washing tank is further washed with sprayed washing water and loosened, thereby ensuring that even substances such as human excrement can be washed more reliably.

Note that the crushing rollers are constantly washed with washing water flowing down in the trough, so the sludge crushing work can be carried out continuously.

A stopper is provided to restrict the lowering position of the swing arm so that the outer circumferential surface of the crushing roller and the protrusion do not come into contact with the bottom surface of the trough even when there is no residue in the trough and only washing water flows down. This stopper may be provided on either the swing arm side or the trough side.

〔Effect of the invention〕

It takes a long time to crush the human excreta in the sediment and dissolve it into the water using a method that uses only stirring blades or jets in the washing tank, but with the present invention, human excrement, etc. As the residue such as feces flows down the trough, it is sheared and crushed by a crushing roller and then supplied to the cleaning tank, so it can be reliably eluted into the cleaning water and washed, improving the cleaning efficiency of the residue. It also has the advantage of shortening the cleaning time.

[Brief explanation of the drawing]

The drawing shows an embodiment of the residue cleaning device of the present invention. Fig. 1 is a front view showing the overall outline, Fig. 2 is a side view thereof, Fig. 3 is a front view of the scum crushing device, Fig. 4 is a plan view thereof,
Fig. 5 is a side view of the same, Figs. 6 to 8 show different embodiments, Fig. 6 is a front view of the two-row crushing roller type, Fig. 7 is a side view thereof, and Fig. 8 is a roller processing method. It is a front view of a pressure type. 1 is a screen, 2 is a rake device, 3 is a trough, 4 is a cleaning tank, 5 is a pipe, 6 is a sludge crusher, 61 is a crushing roller, and 7 is an injection nozzle. Figure 5 Figure 7 Figure VJ6

Claims (1)

[Claims] A trough in which the residue scraped up by the rake device flows down together with washing water, a cleaning tank adjacent to this trough, and a rotating crushing roller that presses into the trough with a required pressure and flows down to shear and crush the residue. A sludge cleaning device consisting of a sludge crushing device and a sludge crushing device.