JPS58101745A - Method and device for separating waste material containing sand - Google Patents

Abstract

PURPOSE:To efficiently wash and separate organic waste materials and sand by washing with the smallest quantity of water, by supplying the sand containing a large amt. of org. waste materials, in order together with a water current, to an inclined rotary type waste material separator and a wet vibrating screen placed in its upper part, both of which are partially submerged. CONSTITUTION:Sand containing much organic waste materials from a sedimentation basin is thrown together with washing water 11 into a rotary drum 3 which is constituted of a wire net, etc. and is inclined and submerged into the water. Subsequently, the sand and fine waste materials except coarse waste materials are screened and discharged to the outside of the drum 3, the waste materials in the drum 3 are stirred together with the washing water 11, and the coarse waste materials are discharged to the rear of the drum 3. On the other hand, the sand discharged from the lower part of the drum 3 is fed to a wet vibrating screen 4, and the fine waste materials are separated from the sand. Also, it is moved to the lower part while leaving the comparatively coarse waste materials on an upper inclined wire net 12, is wound up 6 together with the coarse waste materials from the drum 3, and carries out 7 to the outside of the machine. Also, the sand grains which pass through the wire net 12 and settle are vibrated together with small special form pieces supported by a lower wire net 13, the said grains whose adhering organic matters have been washed out are scraped up by a scrape- up conveyor 5, and are carried out 8 to the outside of the machine.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for efficiently cleaning waste materials and inorganic sand contained in sediment generated from a sedimentation tank in a sewage treatment plant, etc. using a minimum amount of cleaning water. be.

In recent years, as people's lives have improved and become busier, the proportion of organic matter in domestic wastewater has increased. Along with this, the sediment in the settling basin at a sewage relay pumping station or a sewage treatment plant also contains a large amount of organic waste, and the sediment tends to turn into sludge.

Conventionally - The sediment in the settling basin is either stored in a hopper and then transported out, or it is washed with a vibrating machine water shower installed on the ground or water, and the remaining waste is discharged under its own weight.
In the sand settling and cleaning tank, a method of cleaning using air agitation together with cleaning water has been commonly used.

However, these methods generate a foul odor due to the decay of the sediment containing organic substances, making it difficult to transport the waste by truck in busy urban areas.

In addition, after washing with air, the sand becomes a sludge-like mixture of waste containing a large amount of organic matter, so even if this method does not wash the sand and waste, it is difficult to separate the waste from highly organic waste. It cannot be completely separated from the sand, and highly organic waste still remains in the sand.

Based on the above, the present invention separates organic coarse waste along with washing water using an inclined rotating cylinder, furthermore, the coarse waste transferred by a baffle plate provided inside the cylinder is stirred and washed in water at the bottom of the cylinder, The sand is further separated into fine dust and sand using a vibrating sieve, and the organic matter adhering to the sand grains is further separated using a vibrating sieve containing irregularly shaped inorganic scraping pieces inside to remove the organic matter contained in the sand. ．． Large items, 2. The cleaning effect is enhanced by cleaning six types of fine particles, 3゜adhesive organic substances, and by performing these operations in one water tank, the sand can be efficiently cleaned with a small amount of cleaning water, and the sand and waste can be separated. The present invention provides a method and apparatus for cleaning sediment, which is characterized in that it is discharged separately to the outside of the machine.

The apparatus of the present invention includes a partially submerged tilted rotating cylinder having a wire mesh or punch metal with a baffle plate inside, and a cleaning nozzle for further cleaning inside the rotating cylinder, parallel to the rotating cylinder at the bottom of the rotating cylinder. A submerged vibrating sieve having Japanese wire mesh or punch metal is tilted, and a device is provided with a chamber having stepped irregularly shaped pieces formed of integrally structured wire mesh or punch metal corresponding to the vibrating sieve. This combined force is used to convey the separated sand and waste from this device, respectively.

The apparatus used in the present invention will be explained with reference to the drawings.

As shown in FIG. 1 or 111E2, the sand lifted from the sand settling basin is conveyed by a sand settling official conveyor 1, and is thrown into a sand settling chute 2 together with washing water.

Sand containing highly organic waste is fed into the rotating drum 3 from the bottom. The rotating drum 3 is made of wire mesh or punched metal, and is entirely inclined and partially submerged in water. ``The sand containing the thrown waste is passed through the openings of the wire mesh or punch metal in the rotating drum 3, and the coarse waste remains in the drum 3, while the sand and fine waste are permeated and discharged to the outside of the rotating drum 3. The rotating drum 3 has one or more straight blades or spiral blades 10 on the inner surface of the drum, as shown in FIG.
and a cleaning nozzle 11 are provided, the waste is stirred with water, water is further sprayed from the cleaning nozzle 11, and coarse waste is efficiently separated and discharged from the rear of the rotary wheel 3, and the waste scraper 6 removes the waste. It is carried out via the carrying-out conveyor 7.

The sand discharged from the lower part of the rotary drum 3 and the fine waste smaller than the opening of the rotary drum 3 are separated more efficiently than the sand by the wet vibrating sieve 4. The wet vibrating sieve 4 is mostly submerged in water, and has an upper wire mesh 12 whose width direction is horizontal and whose longitudinal direction is inclined, and odd-shaped small pieces 14 made of hard ceramic pieces or the like.
It is composed of a lower wire mesh chamber 13 with a hollow structure that supports the
The inclined upper wire mesh 12 and lower wire mesh chamber 13 have appropriate openings and strength, and are adapted to be vibrated by a vibrator.

Fine waste larger than this opening remains on the upper inclined wire mesh 12 and moves downward on the upper inclined wire mesh 12 from the upper inclined wire mesh 12&C, and is moved downward by the water flow from the washing water.
The waste is washed down to the lower part of the rotary drum 3, and is scraped up by a scrap scraper 6 together with the bulky waste from the rotary drum 3, and then taken out #cm outside the machine by a carry-out conveyor 7.

The sand grains that pass through the upper inclined wire mesh 12 and settle down are vibrated together with the irregularly shaped pieces 14 supported by the lower wire mesh 13 and come into contact with each other, thereby washing away organic matter firmly attached to the sand surface. . The washed sand is shaken off from the lower wire mesh 13 and settles downward. The settled sand is raked up by a sand raking conveyor 5 and carried out of the machine by a sand carrying conveyor 8. The adhesive organic matter separated from the sand by washing is discharged together with the washing water from below the lower wire mesh 13.

There are three types of washing water: washing water put into the input chute to separate sand and waste, washing water from the washing nozzle 11 in the rotating drum 3, and washing water from the lower part of the wet vibrating sieve 4. water is used.

The washing water is introduced into the sand settling chute 2 side, flows down inside the washing tank 15 in the direction of the waste scraping conveyor 6, and is drained from the drainage groove 16.

Since these washing waters are used to separate sand and waste and wash the sand and waste separately in one washing tank 15, cleaning can be carried out without waste. 411k, the washing water from the lower part of the wet vibrating sieve 4 is used to wash adherent organic matter to the Yumeki sieve, carry out the organic substance, carry out the fine waste on the upper inclined wire mesh 13, and further wash and carry out the waste in the rotating drum 3. By implementing the separation method of the present invention, the separation method of the present invention can separate the sand in sediment, highly organic waste, coarse waste, fine waste, and sand grains. It can wash 03 types of adherent organic substances, increasing the cleaning effect of sediment,
It is characterized by efficient cleaning with less cleaning water by carrying out these operations in one washing tank.

[Brief explanation of the drawing]

FIG. 1 is a side explanatory view of an embodiment of the method of the present invention, FIG. 2 is a plan view of the same embodiment, and FIG. 3 is an explanatory diagram of the inside of a rotating drum.
Figure 11E4 shows wet vibrating sieve 3... Inclined rotating cylindrical separator, 4... Wet vibrating sieve, 5... Sand scraping conveyor, 6...
...Waste removal conveyor, 9...Vibration device, 1
0...Baffle plate, 11...Cleaning nozzle,
12... Slanted wire mesh, 13... Lower wire mesh, 14... Irregularly shaped small piece, 15... Washing tank, 16... Drain channel. Agent Asamura Kōgai 4 people Ku-Heroku Figure 3 Figure 4

Claims (1)

[Scope of Claims] A method for separating waste containing sand, characterized by supplying washing water so as to generate a water flow. (2) A tilted rotating cylindrical sieve partially submerged in a washing tank;
A wet vibrating sieve machine having an inclined surface below the tilted rotary cylindrical sieve, a sand scraping conveyor provided below the wet vibrating sieve machine, and a coarse waste outlet of the tilted rotary cylindrical sieve below the Contains sand characterized in that it has a waste scraper and supplies washing water so that an appropriate water flow is generated from above the wet vibrating sieve machine having an inclined rotary cylindrical sieve and an inclined surface in the direction F. Waste separation equipment. (3) A waste separation device containing sand as set forth in claim 2, wherein the inclined rotary cylindrical sieve has straight or spiral blades on its inner surface. (4) In the waste separation device according to claim 2, the wet vibrating sieve has a hollow structure with suitable carrot-shaped openings and a strong structure, and the hollow part is swingably filled with an inorganic scraper. A waste separation device containing sand, characterized in that it is a vibrating sieve containing small particles.