JPH0423561B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to sludge produced when processing collected gravel, sand, crushed stone, crushed sand, etc. into high-quality aggregate for concrete, and other waste from industries and households. This relates to a sewage treatment device that separates the generated sewage into concentrated sludge-like waste and filtered water, and the former can be used for filling soil, etc., or can be easily subjected to final treatment. be.

[Prior Art and Problems to be Solved by the Present Invention] In recent years, gravel and sand used as aggregate for concrete are river gravel, gravel, sand or crushed stone collected from mountains and land due to the depletion of sand, Although there is a shift to crushed sand, the quality of gravel etc. cannot be said to be good.
Since it cannot be used as aggregate for concrete as it is, it is necessary to crush and wash it using a crushing and rewashing treatment device, but when operating this device, a considerable amount of cleaning water is used and the mountain ,
Because the gravel and sand collected on land are mixed with soft stones, red clay lumps, clay lumps, etc., a large amount of waste sludge is generated, and it is not possible to dispose of this directly into rivers from the perspective of preventing environmental pollution. Therefore, concrete aggregate manufacturers currently use a sewage treatment device commonly called a expeller to separate and treat the generated sludge into concentrated sludge-like waste and filtered water.

However, since the above-mentioned extraction machine is very expensive, it is not something that everyone can easily install, but since it is essential to treat wastewater in a manner that meets administrative standards, it is necessary for this industry to do so. There has been a desire for the early development of inexpensive sewage treatment equipment that is easy to introduce.

In view of the above-mentioned conventional problems, the main purpose of the present invention is to provide a sewage treatment system that can be easily designed and manufactured and installed at low cost in accordance with the scale of business of a business operator. be.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a bottom surface that is sloped lower as it extends to one side, and a storage groove provided at the deepest part. In addition to connecting the supply channel, a drainage channel is connected to the outer edge of the shallow water side, and the interior is divided by a plurality of partition plates at intervals from the bottom surface, and a support is established at the center of the upper edge of the reservoir, and the upper end of this support is A main shaft with a motor connected to it is supported by a bearing fixed to the sewage storage tank and a bearing provided outside the sewage storage tank.A large number of arms are fixed radially around the outer circumference of this main shaft, and a filter cage is attached to the tip of the arm. A sludge receiving tank is installed on the outside of the arm in correspondence with the above-mentioned sewage storage. A fan is installed on the outer edge of the sewage storage tank to blow away the dripping water falling from the filtration cage, corresponding to the filtration cage that has just been separated from the sewage stored in the storage tank.

In addition, in order to prevent the filtration function of the filtration cage from deteriorating, a cleaning water injection nozzle for the filtration cage is installed to correspond to the filtration cage that is slightly before it hits the wastewater stored in the sewage storage tank. In addition, a vibrator is attached to the outer surface of the sludge receiving tank in order to promote the filtering function of the filtration net stretched over the inner surface of the sludge receiving tank.

[Function] Since the present invention is configured as described above, sewage is supplied from the supply path to the sewage storage tank while introducing a known separating liquid that has the effect of separating sludge into sludge-like waste and supernatant liquid. 1, the stored sewage is separated into sludge-like waste and supernatant liquid by the action of the separation liquid, and the sludge-like waste flows into the sewage storage which is sloped lower as it reaches one side. Since it descends along the bottom of the reservoir tank 1 and settles intensively in the catchment groove 2, at this time, if the motor 16 is energized and the main shaft 17 is rotated, it can be fixed radially around the outer circumference of the main shaft 17. A large number of filter cages 20 attached to the tip of the arm 18...
20 rotates at an extremely low speed, so that the sludge-like waste that has settled in the storage groove 2 is scooped up one after another by the filter baskets 20...20, and the filter baskets 20 continue to rotate and are stored in the sewage storage tank 1. When the sewage is separated from the water surface, the moisture contained in the sludge-like waste stored in the filter basket 20 passes through the filter net 19 in the filter cage 20 and falls, and at this time, the water contained in the sludge-like waste stored in the filter cage 20 falls through the filter net 19 in the filter cage 20. Since the dripping water falling from the filter basket located above is blown away laterally, filtration by the filter basket 20 is performed efficiently, and as a result, the collected sludge-like waste is concentrated, and in parallel, the filter basket 20 As the arm 20 rotates, its angle of inclination increases, and when it tilts to the opposite side, the sludge-like waste contained inside is automatically thrown into the sludge receiving tank 21 installed outside the arm 18, and as it rotates further. The sewage water lands on the sewage stored in the sewage storage tank 1 again, and the same operation as described above is repeated. The water passes through a filtering net 22 stretched on the inner surface of the sludge receiving tank 21, and is returned to the sewage storage tank 1 through a return port 23 provided at the bottom of the sludge receiving tank 21 corresponding to the filtering net 22. The sludge-like waste stored in the sludge receiving tank 21 becomes further concentrated and becomes easier to handle.
It can be taken out from the outlet 24 provided at the bottom of the container and used as part of buried soil, or it can be completely dried using a drying device and used as buried soil or fertilizer.

By the way, the bottom of the sewage storage tank 1 is sloped lower as it extends to one side, and the interior is divided by a plurality of partition plates 6...6 at intervals from the bottom.
Since the flow or waves of sewage generated by the rotation of the filter cage 20 or the falling water from the filter cage 20 are suppressed, the supernatant liquid of the sewage becomes cleaner as it reaches the shallower side. The supernatant liquid is discharged from a drainage channel connected to the outer edge of the shallow water.

In addition, when the cleaning water injection nozzle 26 of the filter cage 20 is provided in correspondence with the filter cage 20 that is slightly before landing on the wastewater stored in the wastewater storage tank 1, the filter cage 2
This eliminates the possibility of clogging of the filter net 19 at 0, and prevents the deterioration of its function.
8 is attached, the filtering net 22 stretched over the inner surface of the sludge receiving tank 21 vibrates, thereby promoting the filtering function of the filtering net 22.

[Examples] Examples of the present invention will be described below with reference to the drawings.

In the figure, 1 is a sewage storage tank whose bottom surface is sloped lower as it extends to one side, and a storage groove 2 is provided at the deepest part.
A sewage supply channel 4 is connected to the outer edge 3, and a drainage channel 5 is connected to the outer edge on the shallow water side, and the interior is divided by a plurality of partition plates 6...6 at intervals from the bottom surface.

A sewage introduction gutter 7 extending from the sewage source is connected to the sewage supply path 4, and a well-known method for separating sewage into sediment and supernatant liquid is installed on the front and rear side walls 8, 8. Furthermore, a water collection tank 10 is attached to the inlet of the wastewater storage tank 1, and a wastewater supply pipe 11 is installed on the underside of the water collection tank 10.
is connected, and its tip is extended to the storage groove 2 in the sewage storage tank 1.

Reference numerals 12 and 12 denote a pair of columns established at the center of the upper edge of the reservoir groove 2, and a bearing 13 fixed to the upper end of this column.
A main shaft 17 to which a motor 16 is connected via a reducer 14 to a bearing 13' provided outside the sewage storage tank 1 and a motor 16 is supported by a bearing 13' provided outside the sewage storage tank 1. are fixed in a radial manner, and a filter cage 20...20 is attached with the surface facing the rotational direction opened on the outside of the tip and the filter net 19 stretched on the other surface except both the front and rear surfaces, and the filter cage is compatible with this filter cage. A sludge receiving tank 21 with an open top is installed outside the arms 18...18, and a filtration net 22 finer than the filtration net 19 in the filtration basket 20 is stretched on the inner surface of the sludge receiving tank 21, and the sludge receiving tank 21 is provided with a filtration net 22 finer than the filtration net 19 in the filtration cage 20. A return port 23 for filtered water to the sewage storage tank 1 and a sludge discharge port 24 used for taking out concentrated sludge stored in the sludge receiving tank 21 are provided corresponding to the net 22.

25 is a fan for blowing away dripping water falling from the filtration basket 20, and is installed on the outer edge of the sewage storage tank 1 so as to correspond to the filtration cage 20 that has just been released from the sewage stored in the sewage storage tank 1. be.

Reference numeral 26 denotes a cleaning water injection nozzle for the filter basket, which is provided in correspondence with the filter basket 20 that has just reached the wastewater stored in the sewage storage tank 1, and the extension of the cleaning water supply pipe 27 is a pump. It is inserted into a cleaning water storage tank (not shown in the drawings) attached to the drainage channel 5 via a water tank (not shown in the drawings).

Further, 28 is a vibrator attached to the outer surface of the sludge receiving tank 21, and when such a vibrator is provided, it is desirable to install the sludge receiving tank 21 with an elastic body 29 such as rubber interposed therebetween.

[Effects of the Invention] As described above, the present invention collects the sludge-like waste concentrated in the grooves of the sewage storage tank by using a large number of filters installed at the tips of arms fixed radially around the outer circumference of the main shaft. The sludge-like waste is scooped up by a basket, and the water is removed from the stored sludge-like waste while it is transported upwards and thrown into a sludge receiving tank installed outside the arm. Since the device is designed to collect the removed and concentrated sludge-like waste, the processing capacity of the device is limited to the sewage storage tank,
It is determined by the respective sizes of the filter cage and sludge receiving tank and the number of filter cages, so by setting these, it is possible to easily design and manufacture the device in accordance with the business scale of the company using the device. Moreover, since the structure is simple, it has the feature that it can be installed at low cost.

In addition, a fan was installed on the outer edge of the sewage storage tank to blow off the dripping water that falls from the filtration cage, so that it corresponds to the filtration cage that has just been released from the sewage stored in the sewage storage tank. Since the dripping water falling towards the filter basket below is blown away laterally, it has the advantage of efficient filtration.

In addition, if the cleaning water injection nozzle of the filter basket is provided in correspondence with the filter basket that is just before the water reaches the wastewater stored in the wastewater storage tank, the filter net will not be clogged. It can fully demonstrate its function continuously, and furthermore, when a vibrator is installed on the outside of the sludge tank, the filtration net stretched on the inside of the sludge tank vibrates, thereby improving the filtration function of the filtration net. is promoted, so concentrated sludge-like waste can be efficiently separated.

[Brief explanation of drawings]

FIG. 1 is a plan view of an apparatus according to the present invention. FIG. 2 is a longitudinal sectional view of the same as above. FIG. 3 is a sectional view taken along line A--A shown in FIG. 2. In the figure, 1 is the sewage storage tank. 2 is the reservoir. 3 is the outer edge.
4 is the wastewater supply route. 5 is a drainage canal. 6 is a partition plate. 1
2 is the pillar. 13, 13' are bearings. 14 is a reduction gear.
15 and 15' are chains. 16 is the motor. 17
is the main axis. 18 is the arm. 19 is a filter net. 20 is a filter cage. 21 is the sludge tank. 22 is a filter net. 23 is the return port for filtered water. 24 is the sludge outlet. 25 is a fan that blows away dripping water. 26 is a cleaning water injection nozzle for the filter cage. 27 is a cleaning water supply pipe. 28 is a vibrator. 29 is an elastic body.

Claims (1)

[Scope of Claims] 1. A sewage supply channel is connected to the outer edge of a sewage storage tank whose bottom surface is sloped lower as it extends to one side, and a storage groove is provided at the deepest part, and a drainage channel is connected to the outer edge of the shallow water side. The interior is divided by multiple partition plates at intervals from the bottom, and a support is established at the center of the upper edge of the groove.
A main shaft connected to a motor is supported by a bearing fixed to the upper end of this column and a bearing provided outside the sewage storage tank, and a number of arms are fixed radially around the outer circumference of this main shaft, and a filter cage is attached to the tip of the main shaft. A sludge receiving tank is installed on the outside of the arm in correspondence with this filter cage.
A filtration net is stretched on the inner surface, and a filtrate return port and a sludge discharge port are provided at the bottom corresponding to the filtration net. A sewage treatment device comprising a fan for blowing off dripping water falling from a filtration cage on the outer edge of a sewage storage tank in correspondence with a filtration cage. 2. The sewage treatment apparatus according to claim 1, wherein a cleaning water injection nozzle for the filtration cage is provided in correspondence with the filtration cage just before the filtration cage reaches the sewage stored in the sewage storage tank. 3. The sewage treatment device according to claim 1 or 2, wherein a vibrator is attached to the outer surface of the sludge receiving tank.